strings: The said Dresser is to convey to or procure to be conveyed to said Lincoln, by a clear title in fee simple, the entire premises (ground and improvements) in Springfield, on which said Dresser now resides, and give him possession of said premises, on or before the first day of April next—for which said Lincoln, at or before the same day, is to pay to said Dresser twelve hundred dollars, or what said Dresser shall then at his option, accept as equivalent thereto ; and also to procure to be conveyed to said Dresser, by a clear title in fee simple, the entire premises (ground and building) in Springfield, on the block immediately West of the Public square,