39 volumes. (8vo), 26 of the volumes are in period half calf and marbled boards, two in period full mottled calf (but with similar spines) and one in the original sheep.

"Colossal co-operative undertaking; nothing approaching it has ever been attempted in this country." (Howes). "[Bancroft's] History of California is the best extant for it contains more material about the state's past than any other historian has succeeded in amassing." (Zamorano 80). Howes B91; Zamorano Eighty 3.