The William A. Dinsmore site is a domestic dwelling and farm dating from the late 18th century to the mid-20th century. Only about half of the original farmstead remains, as the eastern portion was destroyed in the 1960s by I-93 highway construction.
As part of monitoring, in October 2003, IAC conducted the archaeological recovery of eight sets of human skeletal remains from the18th-century African-American Burial Ground at the intersection of Court and Chestnut Streets. Long alleged as the site of the “Negro Burying Ground,” its location was confirmed during the installation of a sewer manhole. IAC archaeologists removed the clay-covered remains en bloc to a laboratory. Throughout, IAC coordinated between the African-American community, scientific experts, and local and government agencies.