London: Routledge and Kegan Paul, 1959. First edition, small 8vo., pp.ix,232, black cloth, gilt, 7 b/w plates and 3 in-text figures; a very good copy, in a price-clipped dust-jacket, which is chipped to the head of tail of spine, with minimal loss, and has 3cm closed tear to head of fold over upper joint, small closed tear to rear upper margin, and some toning to the pale paper.