Before Basil Rathbone there was William Gillette, a touring American stage actor who played the sleuth more than 1,300 times in the late 19th and early 20th centuries. This silent movie is based on Gillette’s 1899 play about a nefarious effort to recover some scandalous letters. It was shot in Chicago, produced by Essanay Studios (which went out of business soon after it was made). The film was considered lost until a complete negative of the 1920 French release, edited into a four-part serial, was found and restored three years ago. It premiered in 2015. The serialized version, with English intertitles, will be accompanied by theater organ virtuoso and Plaza Classic Film Festival favorite Walt Strony on the Plaza Theatre’s original, restored Wyler Mighty Wurlitzer Pipe Organ.