Map shows areas surveyed along the Prevost, Savana, Morti, and Asnati Rivers in Panama. Coastline near Caledonia Bay on Atlantic side and Gulf of San Miguel coastline and Darien "Harbour" on the western side are displayed. Relief shown by hachures and by cross sections. Scale not given.

Map shows proposed route of Panama Canal, railroads, roads, and existing settlements. Inset: Profile of proposed canal. Relief shown by hachures and profile. Depths shown by soundings. Scale [ca. 1:105,000].

Map shows Central America railroads and canals, political sub-divisions during the mid-nineteenth century. Includes notes and dates on boundaries and railroads. Insets: [Johnson's Mexico] "Territory and Isthmus of Tehuantapec," [Johnson's Central America] Manzanilla I.," "Aspinwall City, Navy Bay," "City of Panama," "The Nicaragua Route," "Isthmus of Panama," and "Harbor of San Juan de Nicaragua." Relief shown by hachures. Depths shown by soundings. Scale not given.