How to Do Archaeology During a Pandemic

Like so many of you, in the middle of March this year, nearly all employees of George Washington’s Ferry Farm & Historic Kenmore began working from home and did not return to our offices for two and a half months.  We expected a lengthy time away and, as such, prepared as best we could for the change.  For some departments, the change mainly involved figuring out access to digital files but, since our jobs revolve around physical artifacts, we archaeologists had to do a little improvising.

The ‘wet lab’ where artifacts are washed before cataloging and analysis sits quietly unused at George Washington’s Ferry Farm during the COVID-19 pandemic of 2020.

First, while it’s normally not a “best practice” to take artifacts home, we really had no choice if we were going to remain productive.  This meant I as archaeology lab supervisor and that Elyse and Judy, archaeology lab technicians , all had to create what essentially amounted to an a archaeology lab in each of our homes.  Elyse and Judy need space to wash, label, and catalogue artifacts while I needed space to analyze artifacts while simultaneously keeping them away from my extremely inquisitive preschooler! I mostly succeeded in that last task. Elyse actually enlisted the help of her older and amazing daughter June with washing artifacts.  As so many of us found out in 2020, working and parenting from home is not easy but Elyse and I adapted well, I think.

Elyse Adams, archaeology lab technician, and her daughter June wash artifacts at home.

It should also be noted, however, that keeping artifacts away from all of our many, many dogs and cats proved challenging as well.   While my cats were thrilled (well, as thrilled as cats can get, at least) that I was home all day, they were occasionally of the opinion that the Washington-era porcelain sherds I was researching looked much better on the floor.

Despite these challenges, we got the job done and eventually returned to the lab at Ferry Farm having accomplished quite a bit.

Life inside Ferry Farm’s archaeology lab looks quite different now, too, compared to this time in 2019. Since the lab is relatively close quarters, we instituted a rigorous cleaning schedule, spaced our work areas out as much as possible, and started taking temperatures every day.  Our beloved volunteers have not come back (Shout out to our volunteers! You guys are awesome!) because we needed to limit the number of people working in the lab to only myself, Elyse, and Judy.

One of the coolest features of our lab is the huge viewing window through which visitors could see real live archaeologists at work.  While Ferry Farm is now open to the public for tours, the visitor center remains closed and there’s no longer any inquisitive folks peering at us through the glass. It’s a surprisingly lonely feeling not to glance up from our work occasionally to see visitors watching what we’re doing.  We also put a temporary halt on lab tours that we do occasionally during special events or children’s camps at Ferry Farm.  Both of these changes are a bummer because we really liked the interaction we had with visitors. That being said, we’re optimistic that someday life will return to normal eventually and we’ll be able to share our lab with the public once again.  When that time does finally comes, please visit and check out the archaeology lab at George Washington’s Ferry Farm. We miss you!

Mara Kaktins, Archaeologist
Archaeology Lab Supervisor

We’re Digging!: A Preview of This Year’s Archaeology Excavation at Ferry Farm

It’s that time of year again!

Actually, it’s past that time of year but better late than never! The annual summer archaeological dig at George Washington’s Ferry Farm – delayed like so many other things by the COVID-19 pandemic – has finally begun!  Ferry Farm’s summer archaeological excavation has become a fall dig too as it runs from August to October this year, instead of in the more typical April to July window.

In 2019, we began excavating a 30 foot by 30 foot square in the work yard in search of outbuildings from George Washington’s time. We know there was a kitchen, slave quarters, store houses, barns, and other buildings on the farm, but we have yet to locate them all. Without these outbuildings, which will eventually be reproduced like the Washington House, we can’t accurately represent what the landscape looked like during George’s childhood.

Archaeologists Lizzie O’Meara and Frank Amico cleaning last year’s dig area for the final photo of 2019.

Last year, we were tasked with excavating the 30 foot by 30 foot area, where we suspect there are still remains of and artifacts from undiscovered buildings. We completed about half of the total area. We dug the soil level down to the colonial-era level in half of our square before we had to close for the year. We also lost a few weeks of time last summer because of the nearly 2 feet of gravel that first needed to be removed. You read that right. 2 FEET! This gravel was from the construction of the Washington house replica in 2017 was leveled directly on top of the area where we needed to excavate.

This summer, we begin the other half of the 30 foot by 30 foot square. We are very excited to continue to dig this area.

Last year we excavated thousands of amazing artifacts including several Washington era wig curlers, Civil War bullets, and Native American projectile points of all shapes and sizes. You can read about last year’s discoveries here.

If visit Ferry Farm during the next several weeks, you can watch us dig on weekdays. My fellow archaeologists and I will be happy to talk with you (while masked and at a 6-foot distance) about our excavation work and some of our recent discoveries.  There will also be occasional updates on the excavation’s progress on our Facebook and Instagram. Then, after the conclusion of the 2020 excavation, watch this space for a summary of our work!

Elyse Adams, Archaeologist
Co-Field Director

The Unlikely Curator: What a Rodent’s Nest Reveals about Historic Kenmore

Rodents are usually seen as one of a museum’s greatest enemies. They damage valuable artifacts and buildings, leave a mess wherever they go, and frighten unsuspecting visitors. Like most museums, Historic Kenmore does its best to make sure no pests make their home in the 18th century plantation house. But, before it became a museum in the early 20th century, Kenmore was not always rodent-free.

Kenmore's East Portico

The east portico of Historic Kenmore shows some neglect to the house and its surroundings. The Howard family, who lived in Kenmore for a long period following the Civil War and was perhaps living in the house when our rodent of interest built its nest, invested a lot of money in refurbishing the house.

In 1989, archaeologists found a mouse or rat’s nest during an investigation of Kenmore’s walls and floors for architectural artifacts. In a recent video, our archeologists and curators carefully picked apart the nest found so long ago and made a cursory analysis of its parts.  This blog post delves more deeply into the history revealed by this rodent – Kenmore’s unlikely curator – and its nest.

The “indoor excavation” at Kenmore in 1989 provided present-day archaeologists at the Foundation a unique opportunity to study artifacts that rarely survive in the elements. Whatever rodent built this nest was a skilled architect in its own right, tightly weaving together bits of cloth, paper, and miscellaneous fluff from around the house to create a soft, structurally sound home of its own. The material came from dozens of sources, each giving insight to life at Kenmore in the late 1800s and early 1900s.

Fabric

Patterned fabric from the nest

When it comes to fabrics, both the people living at Kenmore and the rodent had pretty good taste. While most of the cloth from the nest was a neutral white, beige, or brown, several scraps featured patterns popular from the late 19th through the early 20th century, like a red cloth with cream specks, and another with red and yellow flowers. Most of the cloth in the nest probably came from sheets, towels, or rags, but the few patterned scraps may have once been part of a dress or apron. A few threads are woven around a stiff, curved string, perhaps as part of an eyelet or fastener on a piece of clothing.  Other fibers came from webbing used in upholstering furniture. The rest of the threads, yarn, and fibers are too small to tell where they came from, but it’s clear that the resident rodent had plenty of textiles from which to choose.

Newspaper 1

A series of newspaper ads includes a date of September 6, 1877.

Newspaper 2

A scrap of a cartoon features an old man carrying what appears to be a baby.

A few other gnawings in the nest were less comfortable than threads and cloth. A bit of nutshell, wood splinters, tiny rib bones, and even two insect wings were part of the rodent’s eclectic collection. While these finds make up a small portion of the nest, it appears that the rodent had quite a literary bent. Over a hundred tiny scraps of paper lined the nest. About half of them were marked, while the others have print from books and newspapers. Some of the pieces are so small that not even an entire letter can be seen, but a few are large enough to make out some sentences, determine date of publication, or even identify the book from which the scrap came.

Newspaper 3

A section entitled “Recent Inventions” includes a convertible handbag and seat patented in 1915.

Newspaper 4

An advertisement on the opposite side of the newspaper discusses Christmas Savings funds from Farmers and Merchants State Bank.

One newspaper scrap advertises Christmas saving funds from the Farmer’s and Merchant’s State Bank. On the other side under “Recent Inventions,” Katherine Minehart’s “Combined Hand-bag and Seat” from 1915 is described. A much earlier bit of newspaper announces the opening of a store on September 6, 1877. The scrap from a book may be even older. The words on both sides are Christian lyrics, and were compiled into a book called Union Hymns by the American Sunday School Union. The book and several editions were published in 1835, 1845, and 1860.

Given the short lifespan of most rodents (around 1-7 years), it’s most likely that the nest builder lived in the early 20th century, and scampered off with bits and pieces of discarded old paper and fabric. Except for a few newspapers, this rodent tended to use items with a past. The absence of any plastic in the nest indicates that it probably wasn’t built much past the early 1900s.  Indeed, since the latest scrap found in the nest dated from 1915, the nest itself would have been built in that year or thereafter, just a few years before the house began its transformation into a museum focusing on the lives of 18th century patriots Betty and Fielding Lewis.

The stories of those who lived at Kenmore after the Civil War are not as detailed, but thanks to an unlikely curator, we are given a glimpse into the wardrobes and literary tastes of Kenmore’s late Victorian-era inhabitants.

Abby Phelps, UMW Student
Fleming Smith Scholar

An Unlikely Curator: Inside a Historic Rodent’s Nest [Video]

In this video, we pick apart a rodent’s nest discovered by archaeologists investigating Historic Kenmore’s walls and floors for architectural artifacts. Like most museums, we take extensive pest prevention measures today but, back when it was an actual home, Kenmore was not always rodent-free. This nest revealed some fascinating history and told us a bit about Kenmore itself.

(NOTE: The video was filmed long before COVID-19 physical distancing requirements.)

I Spy: Sewing

Sewing was an important and necessary skill that all girls in the 18th century learned from a young age.  A family’s clothing, bed and table linens, and other items made of fabric were in constant need of repair. These repairs and other sewing tasks were considered women’s work. Along with practical applications, sewing skills included fancier needlework used to make decorative luxuries.

To showcase these artistic needlework skills, girls and young women made samplers. One tool used to make such samplers was a special embroidery hook called a tambour hook. One of these hooks was found by archaeologists in the remains of the Washington house at Ferry Farm. Young Betty Washington probably used this special tool, made of a bone handle and a portion of a steel hook, to add decorative touches to fine needlework projects.

Tambour Hook

Tambour hook used for neddlework excavated by archaeologists from the reamains of the Washington house at Ferry Farm.

Using the picture and list below to find sewing-related artifacts excavated at Ferry Farm!​ Click on the image to enlarge.

Sewing I Spy

Sewing tools

Can you find these artifacts?

  • 3 gold military buttons
  • 2 ‘hook & eye’ hooks
  • 6 thimbles
  • A black button with a star
  • 3 pair of scissors
  • 7 button blanks (one hole)
  • 13 buckles
  • 2 sets of cufflinks
  • A wooden tambour hook handle

“I Look Not On Things Beneath Me”: Our Snobbiest Artifact, a Wax Seal Stamp That Needs To Dial Back that Sass

‘Haughty’ is not a word used often to describe artifacts.  That is, of course, unless the artifact in question is a glass wax seal stamp with a kind of snooty message on it.  Of diminutive size (smaller than a dime) with a pretty little flower in the center it proclaims in reversed letters “I Look Not on Things Beneath Me”.

Kenmore Wax Seal Stamp 1

Wax seal stamp excavated by archaeologists at Historic Kenmore.

Seal Excavated at Kenmore 2

Closeup view of the wax seal through a digital microscope.

Drawing of Wax Seal Stamp

A drawing of the wax seal stamp with the text reversed so it is legible.

Initially thought to be a signet ring, archaeologists at Ferry Farm reexamined it and determined the itty bitty blue piece of glass is actually a wax seal stamp used to personalize letters.  This seems to be an odd choice of message for the recipient of a correspondence but who are we to judge?

Found at Kenmore, this pretty little thing likely dates to the late Victorian period and would have been worn by a woman, possibly at the end of a chatelaine.  Chatelaines were all the rage with Victorian women and consisted of a long chain worn around the neck with charms at the end, which could be tucked into one’s dress or belt.  These charms often had practical uses.  Common chatelaine charms included tiny scissors, cute vials, petite magnifying glasses, and minuscule mirrors.

Unfortunately, some fashionable lady lost this at Kenmore over a hundred years ago, possibly while wandering through the garden, drink in hand, and idly thinking of sending off a letter sealed with a snarky wax message reminding everyone that “I Look Not on Things Beneath Me.”

It’s a good thing that we archaeologists don’t take the same attitude.

Mara Kaktins, Archaeologist
Archaeology Lab Supervisor

Mickey Owen Was Found in the Plaster!: A Look at Some Curious Inclusions Found in Plaster from Historic Kenmore

Historic Kenmore is known for the unique decorative plasterwork seen on many of its ceilings. However, some of its most unusual pieces of plaster were discovered during repair work being done in 1989. These were pieces of plaster that contained large clumps of animal hair and newspaper. An inspection of this plaster, considering an architectural artifact, in the Archaeology Lab has led to several theories about the reasons for these unconventional inclusions. But before we discuss these, it is important to first understand how historic plaster was made and used.

chamber-ceiling

Decorative plasterwork ceiling in the bed chamber at Historic Kenmore.

Plaster was one of the main finishes for interior walls in the United States until the introduction of drywall in the mid-20th century. The two main types produced were lime plaster and gypsum plaster. Lime plaster was made of water, lime, sand, and a fibrous material. The lime could be derived from limestone or oyster shells. The plaster found in Kenmore was probably made from oyster shells from the Rappahannock River, instead of limestone which is not native to this region. The fibrous material was some sort of animal hair such as horsehair, cow hair, hog hair, or even yak hair.[1] Gypsum plaster was introduced in the early 19th century and was often used in conjunction with lime plaster. Gypsum plaster did not require a fibrous binder and would eventually replace lime plaster as a finish coat.

Plaster was applied in a three-coat process. First was the scratch coat, which had the highest hair content of the three coats. This coat was applied to lathe board causing the plaster to ‘key’ (adhere) into the spaces between the lathes. Next, was the brown coat, which was dark in color due to its high content of sand. The last coat to be applied was the finish coat. This coat contained no hair, little sand, and a slightly higher lime content to create a smooth white finish.[2]

Now that we have a better understanding of how plaster is produced, let’s take a closer look at the unique pieces found at Kenmore. As discussed earlier, it is not unusual to find animal hair in plaster; however, the pieces pulled from Kenmore have exceptionally large clumps of hair not normally seen. Hair was added to plaster to act as a binder. It helped to hold the plaster together, reduce shrinkage, and improve strength.[3] Contrary to what one may believe, the process for obtaining hair for plaster was very selective. The hair had to be long, freshly cut, clean, non-greasy, and dry in order to be used in plaster. It also does not appear that people used hair from their own animals; instead, they bought hair from a tanner’s yard or a merchant. When choosing a hair type, horsehair was favored for its length and strength compared to cow or hog hair. [4]  However, horsehair was probably the most expensive and difficult to obtain out of the three.

Plaster 01

A piece of Kenmore plaster that contains a large clump of animal hair.

Once the hair was acquired, it was mixed with the plaster. During this process, it was important to evenly distribute the hair throughout the plaster.[5] This was where the tradesmen making the plaster pieces found at Kenmore made a mistake. They did not distribute the hair properly causing the large clumps that we see. This caused problems when applying the plaster as well as limited the plaster’s strength.[6] Therefore, it can be concluded that the person making this plaster may not have been trained in plasterwork or was a worker under a tradesman who did not follow directions properly. Perhaps this is some experimental plaster made by William Key Howard, Jr. before he started his restoration of the decorative plasterwork on the ceilings of Kenmore in the post-Civil War period.

The next interesting inclusion found in the Kenmore plaster was pieces of newspaper. Newspaper was not used historically for the manufacture of plaster; however, a dozen or so pieces of plaster pulled from Kenmore included newspaper fragments. The newspaper appears to have been torn or balled up and then covered in plaster. A skilled tradesman would not have made or applied plaster in this way. From this, we can conclude that whoever applied this plaster was not trained.

Plaster 02

A piece of Kenmore plaster that contains both animal hair and newspaper.

From inspection of the newspaper, perhaps we can learn a little more about who may have done this. Unfortunately, no dates can be found on the newspaper pieces to give a specific time frame. However, from careful inspection of the incomplete newspaper pieces, it appears that many of the pieces are from the comics or the sports section. On one of the small pieces the words Dodgers, shortstop, and Mickey Owen can be identified. From this, it can be assumed that the paper dates between 1941-1945, the years in which Mickey Owen played for the Brooklyn Dodgers baseball team. The Brooklyn Dodgers experienced winning seasons in both 1941 and 1942, due to the skill of Mickey Owen and his teammates.[7] Therefore, it is likely that the newspaper article came from one of these two years. The time frame can also be limited to the months encompassing baseball season (April to October).

Plaster 03

Kenmore plaster bit containing newspaper that mentions Mickey Owen playing for the Dodgers.

With a probable date range for the plaster pieces, we can begin to look at who occupied Kenmore at the time and why they might have made plaster in this way. In 1922, Kenmore was purchased by the Kenmore Association and was operating as a museum by the 1940s. In the early ‘40s, the Kenmore Association was concluding one of its restorations. A possible theory for the inclusion of newspaper in the plaster is that this plaster was used to patch a hole during the restoration. The small amount of plaster found with newspaper inclusions and the way the newspaper is distributed throughout the plaster, with most of the newspaper layered on the bottom and consecutive layers of plaster seen on top, does point to a possible patch job,.

From the Kenmore 1941 correspondence records, a few references to repair work inside the house were found. In June of 1941, there is a reference to rewiring being done in the house. There is also mention of fire alarms being installed so that they do not show. Finally, the interior walls and ceilings were painted. On the receipt, the painter lists that some of the walls had to be mended. This is the most probable repair in which the newspaper would have been used as a patch. The hired painter was likely not trained in making/repairing historic plaster. This tradesman probably wanted a quick fix and layered newspaper over the spot and plastered over that in order to finish the paint job.

While plaster may not be the most exciting building material to study, it can give a lot of useful insight into the construction and repair of a house. Conclusions about the people commissioning and conducting the work can be derived from the composition and application of plaster. With a little investigation, even unusual inclusions in the plaster can lead to some surprising discoveries about the people who lived and worked at Kenmore and about the life story of Kenmore itself.

Tessa Honeycutt, UMW Student
Fleming Smith Scholar

[1] Henry, Allison, and John Stewart. Practical Building Conservation: Mortars, Plasters and Renders. Ashgate, 2009.

[2] Practical Building Conservation

[3] Practical Building Conservation

[4] Hodgson, Frederick Thomas. Plaster and Plastering: Mortars and Cements, How to Make and How to Use. New York: The Industrial Publication Company, 1901

[5] Ibid.

[6] Practical Building Conservation

[7] Ibid.

The Mystery of the Mane Comb… SOLVED!

A little more than a year ago we published a blog post highlighting a horse’s mane comb excavated years ago at George Washington’s Boyhood Home at Ferry Farm. Though the rusty iron mane comb was incomplete, a lone, decorative “G” located along the top of the comb hinted at a longer name we hoped might be “G.[eorge] Washington.”

Mane comb excavated at Ff

Mane comb excavated at George Washington’s Ferry Farm.

Fortunately, two outside sources soon came to our attention that confirmed our suspicions. A reader of the blog sent a note disclosing his family has a mane comb very similar to ours.  This comb is more complete than ours but more importantly, it has “G.Washing” inset above the teeth!

Blog reader's family mane comb

Blog reader’s family mane comb.

A second source turned up in an online auction in which a horse mane comb was listed for sale with other early 19th century items.  This comb is a wonderfully complete specimen with “G. WASHINGTON” clearly inset with hollow cut lettering in the upper section of the comb above the teeth.

Complete mane comb

Mane comb in an online auction listing. Credit: LiveAuctioneers.com

Our blog reader was not sure how old his mane comb was, and the auction listed theirs as “Federal Period” (early 19th century).  All three examples have similar rope molded decoration along the upper edge of the comb and on the lettering, and only our comb has a slightly different spacing in front of the first letter.  Considering everything, we think that’s enough proof! “G.WASHINGTON” it is!

Washington memorabilia is ubiquitous, commemorating everything including his birth, his death, and his Revolutionary War and Presidential experiences.  Statues, medals, buttons, paintings, ribbons, and hundreds of other products have been made to honor our first president over the last 220 years since his death in 1799. It makes sense that these mane combs are part of that heritage, made as homage to his memory. Why there aren’t more of them out there, I don’t know. But I love the fact that one of these combs made its way back to the farm on the Rappahannock River where George grew up.  Ferry Farm is where he spent his formative years learning not only how to ride his horses, but  also developing those leadership skills he would need to one day lead the Continental Army and eventually the United States of America.

Judy Jobrack
Co-Field Director, Archaeology Lab Assistant

Where Are the Human Remains?: The Washington Family

Ferry Farm’s tens of thousands of years of human habitation has provided archaeologists with nearly 800,000 artifacts to date, consisting of discarded items left by the people who lived on, worked, or visited this land. A question we often receive from visitors is where are graves of the PEOPLE who left behind these discarded items?

Well, nearly all of the Washington family, who lived at Ferry Farm from 1738 to 1772, are buried elsewhere. George is in a burial vault at Mount Vernon, where he died 220 years ago.  If you are a Fredericksburg local, you likely know George’s mother Mary is buried on Washington Avenue near Kenmore, her daughter Betty’s home. Although he died at Ferry Farm, George’s father Augustine is buried at Pope’s Creek where George was born. A Washington family cemetery had already been established there years before. George’s brothers Samuel, John Augustine, and Charles and sister Betty are accounted for in various other cemeteries in both Virginia and West Virginia.

George Washington's Tomb

George Washington’s Tomb at Mount Vernon. Credit: Tim Evanson

Washington Family Burial Ground

Augustine Washington, George’s father, is buried in the Washington Family Burial Ground at Popes Creek, where George Washington was born. Credit: National Park Service

2016MaryWashingtonMounment

Mary, George’s mother, is buried near The Mary Washington Monument on Washington Avenue in Fredericksburg, Virginia.

So, are any Washington family members buried at Ferry Farm? The only Washington buried here is George’s youngest sister Mildred, who was born shortly after the family moved to Ferry Farm in 1738, and died at only 16 months old. Her cause of death is unclear, but the infant mortality rate in the 18th century was far higher then it is today.

The topic of burials at historic sites like Ferry Farm can be both exciting and panic-inducing for archaeologists. In general, we are pretty well-versed in identifying grave shafts long before we reach actual human remains and measures are always taken to know as much as possible about where we are going to dig before we actually initiate an excavation.

Human burials leave telltale signs when they are accidentally disturbed if you are paying attention. When soil is removed from the ground and then returned during the digging of a grave, the now mixed composition of the soil doesn’t look the same as the undisturbed soil surrounding it.

In any case, how to approach the care of a burial site is a serious subject and a legal subject too. In Virginia, if archaeologists discover human remains, a permit or court order is required to continue the excavation. Once permits are in place, forensic archaeologists who specialize in excavating human remains are called in. They must determine if the burial is old or new, and whether or not we may have stumbled into a possible crime scene. Usually (thank goodness), there is no crime scene but a whole new can of worms is opened in determining what to do next.

We don’t know exactly where the remains of Mildred Washington are located on the Ferry Farm property. All we have to locate the burial site is a survey of the property conducted by George himself in 1771, where he uses “the little gate by the tombstone” as his beginning reference point to lay the boundaries of what George called “the fields where my mother lives”.

Along with the survey is an 1833 painting by John Gadsby Chapman of the Washington property facing the Rappahannock River that shows foundation stones where the Washington House stood and, in the approximate location of the grave on George’s survey, the silhouette of an object that resembles an arched headstone.

In 2009, we brought in experts to conduct a geoscientific study to assist in locating but not excavating the grave of Mildred. It would help the foundation planning effort if we knew where this important grave was located. William Hannah, Claude Petrone, John Imlay, and Dale Brown conducted non-destructive remote sensing surveys in and around the area identified in George’s 1771 survey. These remote sensing surveys included ground-penetrating radar (GPR), electromagnetic induction (EMI), and vertical magnetic-gradiometry.

Ground-penetrating radar survey of George Washington's Ferry Farm by Bill Hannah and John Imlay.

Ground-penetrating radar (GPR) survey of a portion of George Washington’s Ferry Farm conducted by Bill Hannah (R) and John Imlay (L).

GPR by DaleBrown and PetePatrone

Dale Brown (L) and Pete Patrone (R) assisted with the GPR survey.

The researchers kept in mind that while finding Mildred’s grave was like searching for a needle in a haystack, there were some clues to hold onto while conducting the search. First, they considered the 1771 survey and the Chapman painting, and then they focused on the probable size of the grave. To prepare themselves for what kind of anomalies to look out for on their equipment, they looked at a modern growth chart for a 16 month old child. The composition of the container holding the body was also considered. It was determined the size of the anomaly should be around 29.25 to 33.25 inches in length, and though it had been 270 years, any iron elements such as coffin nails might be detected with these methods.

Ground-penetrating radar (GPR) uses electromagnetic radiation in the radio spectrum to reflect signals off of anomalies below the surface. In short, radar waves bounce off of objects of different densities in the ground, providing an image of differences in the surrounding area. You can see voids as well as objects. The image created comes back like this:

Electromagnetic induction (EMI) measures changes in electromagnetic fields, and the magnetic susceptibility of both metal and non-metal materials to provide a sub-surface image (below). The resulting image maps areas of more and less resistivity, revealing patterns and shapes that archaeologists can use to identify any possible features.

EMI by Bill Hannah

Bill Hannah begins an electromagnetic induction survey at Ferry Farm.

Vertical magnetic-gradiometry senses total magnetization of ferrous (iron) materials and produces imaging similar to EMI, but using just magnetization instead of electrical conductivity. Patterns and shapes that archaeologists recognize are still present.

SONY DSC

Bill Hannah conducted a magnetic gradiometry survey of Ferry Farm.

Once plotted on a map, there were a few areas in the expected region that had “grave-like” qualities based on the 2009 remote sensing survey.

Diagram from remote sensor survey report show "grave-like" echoes.

Diagram from remote sensor survey report shows “grave-like” echoes.

Armed with evidence from surveys old and new, we theorize that this area is the possible location of Mildred Washington’s grave. But without a full excavation, we can’t be certain if this is Mildred’s gravesite, or if this area even contains a grave at all. Conveniently shaped anomalies can throw off researchers, but these geophysical surveys provided useful evidence. There are indeed a few anomalies that are the right length, width, and depth of a grave for a young child. We have not conducted any ground-truthing, or surveys that involve coring or probing the ground, nor have we dared to move dirt in this area for fear of disturbing Mildred’s final resting place. The area remains undisturbed, even while the surrounding excavations and the construction of the replica Washington House took place from 2016 to 2018. Due to the destructive nature of archaeology, avoiding the grave site is best for now, and there are no plans to disturb or excavate the area.

Elyse Adams, Archaeologist
Co-Field Director / Archaeology Lab Technician