8vo. 12 volumes, set. First editions thus. Original navy cloth, lettered on the spines and with gilt emblems to the front boards. Top edges gilt, others untrimmed. Portrait frontispieces, except volume 12. 5 folding facsimile plates, 35 folding maps and plans, 55 plates etc. including several folding. Covers a little rubbed at extremities and with some light marking to the first three volumes. Light foxing, as usual, to margins and endpapers. Ink presentation on the half-title of volume 1. Very good +.