Mexico & Guatemala. Published by Charles Desilver, No. 251 Market Street, Philadelphia. Entered ... 1856 by Charles Desilver ... Pennsylvania. (with four inset maps) The Isthmus of Tehuantepec showing Proposed Route from the Gulf of Mexico to the Pacific Ocean, The Isthmus of Nicaragua Showing the Proposed Routes from the Caribbean Sea to the Pacific Ocean, Guatemala or Central America, and the Valley of Mexico.