Question: Which was a stage director, Roy Del Ruth or John D. Hancock?

Context articles: The Maltese Falcon (1931 film)
Hogan's Alley (film)
Why Must I Die?
The Hottentot
The Alligator People
John D. Hancock
Roy Del Ruth
The Desert Song (1929 film)
Starlift
The Aviator (1929 film)

The Maltese Falcon is a 1931 American pre-Code crime film, based on the novel of the same name by Dashiell Hammett and directed by Roy Del Ruth.
 The film stars Ricardo Cortez as private detective Sam Spade and Bebe Daniels as Ruth Wonderly.
 Maude Fulton, Brown Holmes, and Lucien Hubbard (who went uncredited) wrote the screenplay.
 The supporting cast features Dudley Digges, Thelma Todd, Walter Long, Una Merkel, and Dwight Frye.
 The film is based on the 1929 novel "The Maltese Falcon" by Dashiell Hammett published by Alfred A. Knopf, Inc.
Hogan's Alley (1925) is a silent film comedy produced and distributed by Warner Bros..
 It was an early directing assignment for Roy Del Ruth and starred Monte Blue, Patsy Ruth Miller, and Ben Turpin.
 This film is a precursor to the sound film "One Round Hogan", a later Monte Blue boxing vehicle.
Why Must I Die?
 is a 1960 neo noir film directed by Roy Del Ruth, and starring Terry Moore and Debra Paget.
 It was released by American International Pictures as a double feature with "The Jailbreakers".
 This was director Roy Del Ruth's final film.
The Hottentot is a lost 1929 American pre-Code film directed by Roy Del Ruth and starring Edward Everett Horton and Patsy Ruth Miller.
 It is based on a 1920 Broadway play, "The Hottentot", by William Collier, Sr. and Victor Mapes.
The Alligator People is a 1959 CinemaScope science fiction horror film directed by Roy Del Ruth.
 It stars Beverly Garland, Bruce Bennett and Lon Chaney Jr. This film was the penultimate feature directed by Del Ruth and quite different than those of his days at Warner Bros.
John D. Hancock (born February 12, 1939) is an American stage and film director, producer and writer.
 He is perhaps best known for his work on "Bang the Drum Slowly".
 Hancock's theatrical work includes direction of both classic and contemporary plays, from Shakespeare to Saul Bellow.
Roy Del Ruth (October 18, 1895, Philadelphia, Pennsylvania – April 27, 1961) was an American film director.
The Desert Song is a 1929 American Pre-Code operetta film directed by Roy Del Ruth and starring John Boles, Louise Fazenda, and Myrna Loy.
 It was photographed partly in two-color Technicolor, the first film released by Warner Bros. to be in color.
 Although some of the songs from the show have been omitted, the film is otherwise virtually a duplicate of the stage production and extremely faithful to it.
 It was based on the hit musical play with music by Sigmund Romberg and book and lyrics by Oscar Hammerstein, Otto Harbach and Frank Mandel
Starlift (aka Operation Starlift) is a 1951 American musical film released by Warner Brothers in directed by Roy Del Ruth and written by Karl Lamb and John D. Klorer.
 The film stars Janice Rule, Dick Wesson, Ron Hagerthy and Ruth Roman.
 "Starlift" was made during the beginning of the Korean War and centers on an Air Force flyer's wish to meet a film star, and her fellow stars' efforts to perform for injured men at the air force base.
The Aviator is a 1929 American Pre-Code Vitaphone comedy film produced and released by Warner Bros. Directed by Roy Del Ruth, the film was based on the play of the same name by James Montgomery and starred Edward Everett Horton and Patsy Ruth Miller.
 "The Aviator" is similar to the silent comedy "The Hottentot" (1922), where a hapless individual has to pretend to be a famous steeplehorse jockey.
 "The Aviator" today is considered a lost film.