First Edition. H. T. dustjacket art. Hubin listed mystery in which "Sir Morgan Greare, well-known surgeon, is discovered to be exacting huge fees from his wealthy patients, who live in willing subservience to his every command". An uncommon mystery with horror elements of a deranged doctor who turns his patients into his personal "slaves" by exposing them to a narcotic gas of his own invention. Near Fine in Very Good dustjacket with shallow edge chipping.