 Beginning in 1664, Calvert's heir, Leonard Calvert, began subdividing this claim and issuing title to various sized parcels to buyers.On September 24, 1685, Andrew Clarke purchased from Calvert of land fronting on the Anacostia River.The southern boundary of this "patent" (as title to land was called) began about where East Capitol Street meets the river, and ran north-northwest to about Trinidad Avenue NE.