The Damp Man (subtitled Swim Meet of Doom!) is s concise adventure for Call of Cthulhu. The adventure is adapted from the story "The Damp Man" by Allison V. Harding. It was originally published in the Chaosium Digest (periodical e-mail digest). The adventure is set in the modern time period but can also be readily adapted to the 1920s.
The adventure begins with the investigators attending a local girls' swimming competition in the early qualifications for the state swimming championships.