Illus. with plates. London: Routledge & Kegan Paul, 1963-1981. Four volumes. 8vo. Green cloth, stamped in gilt. xliv, 428 + xxiv, 408 + xii, 266 + xxvi, 357 p. All but the first volume are 1st editions. The first volume is a bit bumped at top & base of the spine; else all are fine in dust wrappers, the first two of which exhibit minor wear & the latter two have faded spines. 
Extra shipping for this set.