The Washington Map Of The United States. By the Superintendent U.S. National Observatory, Washington D.C. 1861. S. Taintor & Co. Publisher, W.H. Holmes, Engraver. 334 Pennsylvania Ave. Washington D.C. F. Mahler, C.E. Head Draughtsman. Entered ... 1861 by Robert P. Smith ... Pennsylvania. (with 6 inset maps and 3 profiles).