Join Baltimore Heritage for an evening with Dr. Tim Horsley – an expert in the archeological science of using remote sensing to discover stories from the past literally buried deep underground. In today’s Patterson Park, Dr. Horsley is using ground-penetrating radar, magnetometry and other techniques to help us find the remains of the Battle of Baltimore’s Eastern Defensive Line for We Dig Hampstead Hill.
With M.A. and Ph.D. degrees in archeological prospection from the University of Bradford, United Kingdom, Dr. Horsley established Horsley Archaeological Prospection, LLC, in 2008 and has rapidly become one of the most sought after consultants in eastern North America. The geophysical survey techniques he employs provide a non-invasive method to identify buried features, which can range from human burials to historic and prehistoric fortifications.
Please join us for light refreshments, an introduction to the Searching for the War of 1812 project by Dr. John Bedell, Louis Berger Group, and a show-and-tell on Hampstead Hill with Dr. Tim Horsley. Registration is not required for this free informal program.
Geophysical remote sensing is an important tool for modern archaeological research. Using geophysical methods it is now often possible to map features such as buried earthworks in detail without putting a shovel to the ground. Dr. Horsley has proposed to use a combination of high-resolution magnetometry and ground-penetrating radar (GPR) to locate and map the remains of the earthworks. These techniques have different strengths and weaknesses, and are impeded by different sorts of obstacles, so the combination of the two has the best chance of success.
What is going on in the park this week (March 24-28)?
The team is starting by laying out a survey grid of 30-meter squares extending north and south from the Pagoda. If you see a bamboo pole or other flags in the park this week, please don’t worry! Those flags are placed to mark the location of the grid.
Once a grid is established, the team plans to use a magentometer survey covering an area of about 5 acres to find a “signature” for the earthworks. Then they will try to trace that signature across the landscape of the park. In locations where interference (for example from buried utilities) prevents accurate measurements with the magnetometer, the team will also use ground-penetrating radar. If there are areas where neither of these techniques is effective, we can even use a soil resistivity survey as a third option.
What are we trying to learn with this project?
The remote sensing survey is key to answering our primary research questions:
Where were the earthworks around Hampstead Hill located?
How did the city construct the earthworks?
Can we find any other features like privies or magazines?
Did the people who built and camped at Hampstead Hill leave behind any evidence that we can find?
Answering these questions can offer us a better understanding of the history of the Battle of Baltimore by showing how the defenders took advantage of the terrain in laying out the entrenchments. They also provide us with the important information we need to preserve and protect the earthworks from future development activity in the park.
Stop by the project site anytime to say hello or join us for light refreshments on Thursday evening to meet the project principal investigator Dr. John Bedell with the Louis Berger Group and Dr. Tim Horsley who will demonstrate the equipment in use this week! Registration is not required for this free and informal program.
Today it’s best known for the pagoda, summertime jazz concerts and some of the city’s best sledding. But an archaeological dig planned for Patterson Park’s Hampstead Hill seeks to revive a largely forgotten 200-year-old story. While most know Fort McHenry’s role in the Battle of Baltimore, thanks to Francis Scott Key and “The Star-Spangled Banner,” few know or remember what transpired on the hill overlooking the harbor. Buried there could lie remnants of the trenches that helped Baltimore fend off advancing British land forces and end the War of 1812.