3 volumes. 412; 446 pp. + atlas volume. Additional maps and illustrations in text volumes. (8vo) 24x15.5 cm. (9½x6¼"), red cloth, top edges gilt on text volumes, edges untrimmed, plain paper jackets (original?). First Edition.

Vols. III, IV & V of Clark's American Trails Series. Important, detailed history of the legendary express company, featuring numerous reproductions of early photographs, advertisements, handbills, maps, etc. Often considered the best work on the first overland postal service from the Mississippi to the Pacific Coast.