Parker believed that he had fulfilled his responsibilities. Later that same day, he resigned from his position at Wellington House, due to, he said, his failing health. All of Wellington House's activities were kept in complete secrecy. This increased the credibility of their publications, because they could not be traced back to any official sources. Parker's letters concealed their connection and origin with the British government, and his American contacts never realized they were being manipulated. Today his influence on the First World War and America's entry into it is often overlooked, even by seemingly comprehensive propaganda analysis. Filmography , directed by J. Searle Dawley (1912, short film, based on the short story The House with the Tall Porch) , directed by J. Searle Dawley (1913, short film, based on the short story The Going of the White Swan) The Superior Law, directed by Oscar A. C. Lund (1913, short film, based on the novel The Right of Way) , directed by (1913, short film, based on the novel The Translation of a Savage) , directed by J. Searle Dawley (1913, short film, based on the short story The Lane That Had No Turning) Pierre of the Plains (1914, based on the short story collection Pierre and His People) , directed by Colin Campbell (1914, short film, based on the short story The Going of the White Swan) The Seats of the Mighty, directed by T. Hayes Hunter (1914, based on the novel The Seats of the Mighty) The Right of Way, directed by John W. Noble (1915, based on the novel The Right of Way) Jordan Is a Hard Road, directed by Allan Dwan (1915, based on the short story Jordan Is a Hard Road) The Judgment House, directed by J. Stuart Blackton (1917, based on the novel The Judgment House) The World for Sale, directed by J. Stuart Blackton (1918, based on the novel The World for Sale) Wild Youth, directed by George Melford (1918, based on the novel Wild Youth) Heart of the Wilds, directed by Marshall Neilan (1918, based on the short story She of the Triple Chevron) You Never Know Your Luck, directed by Frank Powell (1919, based on the novel You Never Know Your Luck) The Right of Way, directed by John Francis Dillon (1920, based on the novel The Right of Way) Behold My Wife!, directed by George Melford (1920, based on the