Gertrude Elizabeth, Lady Colin Campbell ("née" Blood; 3 May 1857 – 1 November 1911) was an Irish-born journalist, author, playwright, and editor.
 She was married to Lord Colin Campbell, a brother-in-law of Princess Louise, Queen Victoria's fourth daughter.
Desert Nights (also known as Thirst) is a 1929 American silent adventure/romantic drama film starring John Gilbert, Ernest Torrence, and Mary Nolan.
 Directed by William Nigh, the film is the last silent film starring John Gilbert.
Deep Waters is a lost 1920 American silent drama film directed by Maurice Tourneur and written by F. Hopkinson Smith, Michael Morton and John Gilbert.
 The film stars Rudolph Christians, Barbara Bedford, John Gilbert, Florence Deshon, Jack McDonald, Henry Woodward, and George Nichols.
 The film was released on October 10, 1920, by Paramount Pictures.
Colin Campbell, 1st Earl of Argyll (died 10 May 1493) was a medieval Scottish nobleman, peer, and politician.
 He was the son of Archibald Campbell, Master of Campbell, and Elizabeth Somerville.
 He had the sobriquet Colin Mulle, Bold Earl Colin.
His Glorious Night is a 1929 Pre-Code American romance film directed by Lionel Barrymore and starring John Gilbert in his first released talkie.
 It has gained notoriety as the film that reputedly ended the career of John Gilbert by revealing that he had a voice unsuitable for sound.
John Gilbert (born John Cecil Pringle; July 10, 1899 – January 9, 1936) was an American actor, screenwriter and director.
 He rose to fame during the silent film era and became a popular leading man known as "The Great Lover".
 At the height of his career, Gilbert rivaled Rudolph Valentino, another silent film era leading man, as a box office draw.
John Gilbert Cooper or John Gilbert (24 August 1722 – 21 April 1769) was a British poet and writer.
The White Circle is a lost 1920 American drama silent film directed by Maurice Tourneur and written by John Gilbert and Jules Furthman.
 The film stars Spottiswoode Aitken, Janice Wilson, Harry Northrup, John Gilbert, Wesley Barry, and Jack McDonald.
 It is based on the short story "The Pavilion on the Links" by Robert Louis Stevenson.
 The film was released on August 22, 1920, by Paramount Pictures.
Sir Colin Campbell of Lundie, 1st Baronet (died c. 1650) was a Scottish noble.
 He was the son of Colin Campbell of Lundie, who was youngest son of Colin Campbell, 6th Earl of Argyll.
 Sir Colin was created a baronet in 1627.
James Colin Campbell (11 October 1859 – 26 August 1928) was a Scottish-born film director, actor and screenwriter.
 He directed 177 films between 1911 and 1924.
 He also wrote for 60 films between 1911 and 1922.
 He was born in Scotland, and died in Hollywood, California.

Question: Who has written for more films, Colin Campbell or John Gilbert?
Answer: Colin Campbell