Relief shown by hachures.; Title on slipcase: Central America, Isthmus of Tehuantepec, Panama and Nicaragua.; Transferred from the collection of the Canal Zone Library-Museum, 1980.; Hand colored.; Sectioned and mounted on back clothing.; Includes inset of "Isthmus of Panama," 5 relief profiles, notes, and list of "Length of proposed routes."; Label of publisher's advertisement mounted on verso.; Canal Zone Library map checklist number: 178.|56 x 80 centimeters|Scale approximately 1:2,750,000