Title: The penguin pool murder
Description: Murder mystery featuring Hildegarde Withers. First published 1931. 

The transformation of a prim schoolteacher into an amateur sleuth begins with a school visit to the New York Aquarium.
Subjects: Fiction, Hildegarde Withers (Fictitious character), Women detectives, Women teachers, Withers, hildegarde (fictitious character), fiction, Teachers, fiction, New york (n.y.), fiction, Fiction, mystery & detective, general, Fiction, mystery & detective, women sleuths
Places: New York (N.Y.), United States