T.B. was a 19th Century crossroads community named for a boundary stone with a “T” on the west side and “B” on the east that marked the division of acreage of William Townshend and Thomas Brooke. Established at the intersection of pre-revolutionary roads linking the port town of Accokeek with plantations on the Patuxent, Piscataway Village, and Upper Marlboro, it became a commercial center and a stop on the stagecoach line to Washington. After railroads went through Brandywine in the 1880s, T.B. became a quiet rural village.