WALLACE, EDGAR. His pet madman. (In Detective story magazine, Apr. 5, 1930) (Pub. abroad as Sergeant Sir Peter's cases, no.4: Dr. Fifer's patient, in Strand magazine, Mar. 1930) © 15Feb30, AI-13736; 28Mar30, B65463. Patricia Marion Caldecott Frere (C); 3Apr57; R190419.