Question: Are Erle Stanley Gardner and Michael Moorcock both authors?

Context articles: Special Investigator (film)
Gold Seal Novel
Erle Stanley Gardner bibliography
List of Perry Mason episodes
Perry Mason (radio)
Perry Mason (TV series)
Perry Mason bibliography
Erle Stanley Gardner
Michael Moorcock
The Case of the Howling Dog

Special Investigator is a 1936 RKO Radio Pictures American crime-drama film, starring Richard Dix and featuring Margaret Callahan, Erik Rhodes and Owen Davis, Jr..
 It was directed by Louis King from a screenplay by Louis Stevens, Thomas Lennon and Ferdinand Reyher, based on "Fugitive Gold", a story by Erle Stanley Gardner originally serialized in the "New York Herald Tribune"'s "This Week" magazine from May 26–July 7, 1935.
Gold Seal Novels are illustrated novels covering a wide range of genres published in editions of the Sunday "Philadelphia Inquirer" between 1934 and 1949.
 They were published as a "complete illustrated novel" as a section of the newspaper's Sunday edition.
 Authors include John Dickson Carr, Clyde Brion Davis, Erle Stanley Gardner, Graham Greene, Fannie Hurst, Frances Parkinson Keyes, Sinclair Lewis, Philip MacDonald, Cecile Hulse Matschat, Mary O'Hara, Ellery Queen, Georges Simenon, Rex Stout and Eudora Welty.
 To date, 382 Gold Seal Novels have been cataloged by collectors.
This is a bibliography of works by and about the American writer Erle Stanley Gardner.
This is a list of episodes for "Perry Mason", an American legal drama series that aired on CBS television for nine seasons (September 21, 1957 – May 22, 1966).
 The title character, portrayed by Raymond Burr, is a fictional Los Angeles criminal defense lawyer who originally appeared in detective fiction by Erle Stanley Gardner.
 Many episodes are based on novels and short stories written by Gardner, with some stories having been adapted more than once.
Perry Mason is a radio crime serial based on the novels of Erle Stanley Gardner.
 Broadcast weekdays on CBS Radio from 1943 to 1955, the series was adapted into "The Edge of Night" which ran on television for an additional 30 years.
Perry Mason is an American legal drama series originally broadcast on CBS television from September 21, 1957, to May 22, 1966.
 The title character, portrayed by Raymond Burr, is a fictional Los Angeles criminal defense lawyer who originally appeared in detective fiction by Erle Stanley Gardner.
 Many episodes are based on stories written by Gardner.
The following is a list of the Perry Mason novels and short stories by Erle Stanley Gardner, published from 1933 to 1973.
Erle Stanley Gardner (July 17, 1889 – March 11, 1970) was an American lawyer and author.
 Though best known for the Perry Mason series of detective stories, he wrote numerous other novels and shorter pieces, as well as a series of nonfiction books, mostly narrations of his travels through Baja California and other regions in Mexico.
Michael John Moorcock (born 18 December 1939) is an English writer, primarily of science fiction and fantasy, who has also published literary novels.
 He is best known for his novels about the character Elric of Melniboné, a seminal influence on the field of fantasy in the 1960s and 1970s.
The Case of the Howling Dog is a 1934 American mystery film directed by Alan Crosland, based on the novel of the same name by Erle Stanley Gardner.
 The film stars Warren William and Mary Astor.
 This was the first in a series of four films in which William played Perry Mason.