05/11/1915
Overview
Young Edyth Vail, believes her fiancé Allen Morris may have committed a murder, asking Ashton Kirk to investigate the crime. The fiancé admits he went to the David Hume's home to retrieve plans for a submarine, invented by his scientist father and stolen by the murdered man, but Allen claims he left the home before retrieving the plans. Kirk uses a train conductor's punch ticket to discover the identity of the murderers, one of whom is mute, and sets a trap to apprehend the suspects.
Pathé Exchange

IMDb: https://www.imdb.com/title/tt0005738
Wikipedia: https://www.wikidata.org/wiki/Q19864821
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