Relief shown by hachures and spot heights. Shows California's gold region and western trails. "Entered according to act of Congress in the year 1849 by J.H. Colton ..." Prime meridians: Greenwich and Washington. "Printed at Ackermans r[ooms 120?] Fulton St. N.Y." Includes 2 insets, ill., and distance table. 1 map: hand col.; 39 x 55 cm.