Relief shown by hachures. Pen-and-ink (black) over pencil grid on tracing linen. "Copied from map of Sonnenstern in office of Dr. Flint, at Rivas (1863)." Available also through the Library of Congress Web site as a raster image. Includes two insets. In lower right bottom: L.M. Haupt, Rivas, Nic., Jan. 21, 1898. Geographic coordinates and place names annotated in pencil by later hand. Imperfect: ...
Sonnenstern, Maximilian Von - Haupt, Lewis M. (lewis Muhlenberg)
"30th setiembre de 1897." Annotated in red ink: Approximate position of Puerto Castillo in 1858 as per award of arbitrator E.P. Alexander. Annotated in red ink: As claimed by Costa Rica, 1858. Available also through the Library of Congress Web site as a raster image.