Sir Alfred Hitchcock's directorial debut. The story was about low-income residents of a building. It was written by a woman employed at Islington, her precise identity unknown. Even the title is unclear: Islington Studios' records listed it as being "Mrs. Peabody", but Hitchcock always referred to it as Number 13 (possibly because it was the thirteenth film he was involved in making, in some capacity) Hitchcock's uncle Joseph invested in this movie, and when the funds ran out, Clare Greet also pitched in funding. But the filming was ultimately shut down with only two reels of film completed. Despite the fact that several people have rated it here on IMDb, this movie was never completed or shown, but Adrian Brunel claims Hitchcock showed it to him in an unfinished state. The footage filmed is now long-lost, and nothing else is known about it, apart from Hitchcock's alleged assertion that it wasn't very interesting.
The film's working or proposed title was "Mrs. Peabody". As the film was never finished (only about 20 minutes was shot), and was never released (and has since been lost), it can't be said to have any official released title. The "title" Number 13 was rather a designation by Hitchcock, who referred to this film in interviews as the 13th film he worked on. For the previous 12, Hitchcock designed the title cards (intertitles) from 1920-22. His number 13 was his lucky number as he was promoted to Director.