Phantom Stallion is a 1954 American western film directed by Harry Keller and starring Rex Allen, Carla Balenda and Slim Pickens.
 The film is credited as being the last singing cowboy Western.
Fort Dodge Stampede is a 1951 western film produced and directed by Harry Keller and starring Allan Lane.
 This film is one of 34 'B-movie' westerns filmed between 1947 and 1953 featuring Allan 'Rocky' Lane and his horse Black Jack.
Walter Murray Gibson (March 6, 1822 – January 21, 1888) was an American adventurer and a government minister in the Kingdom of Hawaii prior to the kingdom's 1887 constitution.
TimeTripper is a series of science fiction books by Stefan Petrucha following Harry Keller, a teenager who can see time itself and his love interest Siara Warner, who helps him through some tough situations.
 Harry, not always aware of the significance of events, travels between linear time and A-Time to fix the outcome of events in the lives of others.
Angela Murray Gibson (June 29, 1878 – October 22, 1953) was a writer, director, actress, and the first newsreel camerawoman.
The Unguarded Moment is a 1956 American Technicolor drama film noir thriller film directed by Harry Keller and starring Esther Williams, George Nader, John Saxon and Edward Andrews.
Harry Keller (22 February 1913 – 19 January 1987) was an American film editor, producer and director, who made a number of westerns and worked for many years at Universal Pictures.
 He is perhaps best remembered today for shooting additional footage on "Touch of Evil" (1958).
Robert Murray Gibson (August 20, 1869 – December 19, 1949) was a United States federal judge.
 Prior to his legal career, he briefly played professional baseball for the Chicago Colts and Pittsburgh Alleghenys.
Tarnished is a 1950 American action film directed by Harry Keller and written by John K. Butler.
 The film stars Dorothy Patrick, Arthur Franz, Barbra Fuller, Jimmy Lydon, Harry Shannon and Don Beddoe.
 The film was released on February 28, 1950, by Republic Pictures.
Six Black Horses is a 1962 American Eastmancolor Western film directed by Harry Keller and starring Audie Murphy, Dan Duryea and Joan O'Brien.

Question: Did Harry Keller and Angela Murray Gibson die at the same age?
Answer: no