No. 27. Connecticut. Guilford sheet. U.S. Geological Survey, J.W. Powell, Director. State of Connecticut ... commissioners. Henry Gannett, Chief Topographer. Marcus Baker, Topographer in charge. Triangulation by U.S. Coast and Geodetic Survey. Topography by E.B. Clark. Surveyed in 1890. Engraved by Julius Bien & Co., N.Y. (1893)