First Edition. Boris Artzybasheff dustjacket art. The last book to feature Prof. Theoritus Lucious Westborough, a scholar specializing in Roman history. It's another locked room case involving rare jade. Very Good, bookplate at front pastedown, some minor cloth discoloration, in Very Good dustjacket, couple of pieces of scotch tape at verso of spine ends, some nicks and light wear to edges, lower corner of front flap inexplicably clipped.