Question: How many silent films did the director of "The Soul of Youth" direct between 1914 and 1922?

Context articles: Charles Villiers (actor)
The Soul of Youth
Hoot Gibson filmography
Kevin Brownlow
Douglas Haig (actor)
A Rich Man's Plaything
Karl Grune
William Desmond Taylor
Her Sister from Paris
The Soul of Broadway

Charles Villiers was an Australian actor and occasional director who appeared in many silent films.
 According to a contemporary report, "there is probably no actor in Australia that has done more consistent picture work than Mr. Yilliers, both as heavy lead, and director."
 He was particularly well known for playing villains.
The Soul of Youth is a 1920 American silent drama film directed by William Desmond Taylor, produced and distributed by Realart Pictures.
 Produced under the working title "The Boy", it stars Lewis Sargent and Lila Lee.
Gibson's career began in 1910 with early silent film "shorts", and he continued as a movie star once "talkies" were introduced, his first sound film being "The Long, Long Trail" (1929).
 Primarily starring in Western films, Gibson worked with many directors, including John Ford, who would direct many popular American Westerns and Civil War films, over his fifty years of film production, including "The Horse Soldiers" (1959), starring John Wayne, in which Gibson played a supporting role.
 As with many silent and early recordings, a number of Gibson's films are considered to be lost.
Kevin Brownlow (born 2 June 1938) is a British film historian, television documentary-maker, filmmaker, author, and film editor.
 Brownlow is best known for his work documenting the history of the silent era.
 Brownlow became interested in silent film at the age of eleven.
 This interest grew into a career spent documenting and restoring film.
 He has rescued many silent films and their history.
 His initiative in interviewing many largely forgotten, elderly film pioneers in the 1960s and 1970s preserved a legacy of early mass-entertainment cinema.
 Brownlow received an Academy Honorary Award at the 2nd Annual Governors Awards given by the Academy of Motion Picture Arts and Sciences on 13 November 2010.
 This was the first occasion on which an Academy Honorary Award was given to a film preservationist.
Douglas Patrick Haig (March 9, 1920 – February 1, 2011) was an American child actor appearing in films in the 1920s and 1930s.
 His career began at age two in silent films and (unlike many silent film actors) continued into sound films ("talkies").
A Rich Man's Plaything was a 1917 American silent drama film produced and distributed by the Fox Film Corporation.
 The film starred Valeska Suratt in her final film role.
 "A Rich Man's Plaything" is now considered lost.
 It is one of many silent films that were destroyed in a fire at Fox's film storage facility in Little Ferry, New Jersey in July 1937.
Karl Grune (22 January 1890 – 2 October 1962) was an Austrian film director and writer who made many silent films in the 1920s.
William Desmond Taylor (26 April 1872 – 1 February 1922) was an Irish-born American director and actor.
 He was a popular figure in the growing Hollywood motion-picture colony of the 1910s and early 1920s, having directed 59 silent films between 1914 and 1922 and acted in 27 between 1913 and 1915.
Her Sister from Paris is a 1925 American silent comedy film directed by Sidney Franklin and starring Constance Talmadge, Ronald Colman and George K. Arthur.
 Unlike many silent films, it is still extant.
The Soul of Broadway was a 1915 American silent crime drama film produced and distributed by the Fox Film Corporation and directed by Herbert Brenon.
 Popular vaudeville performer Valeska Suratt starred in the film which was also her silent screen debut.
 "The Soul of Broadway" is now considered lost.
 It is one of many silent films that were destroyed in a fire at Fox's film storage facility in Little Ferry, New Jersey in July 1937.