Mari Sandoz. The Beaver Men: Spearheads of Empire (American Procession Series). New York: Hastings House, 1964. Advance presentation edition.  Signed by Mari Sandoz. Octavo. 335pp (indexed). Illustrated. Publisher's plum cloth, spine lettered in gilt, front cover in blind, map endleaves, original unclipped dust jacket listing $5.95. From the collection of Robin and Kathryn Smiley.