Della Street is the fictional secretary of Perry Mason in the long-running series of novels, short stories, films, and radio and television programs featuring the fictional defense attorney created by Erle Stanley Gardner.
Genevieve Tobin (left) as Della Street, with Warren William and Patricia Ellis in The Case of the Lucky Legs (1935)
The Case of the Howling Dog is a 1934 American mystery film directed by Alan Crosland, based on the 1934 novel of the same name by Erle Stanley Gardner. It is first in a series of six Perry Mason films Warner Bros. made between the years 1934 and 1937.