The Curse of the Black Spot by a Siren-like creature who marks people with black spots on their palms after they are injured and appears to disintegrate them with her touch after putting them in a trance. Rory Williams receives a cut during a tussle with the pirates, and finds a black spot on his hand, but is prevented from succumbing to the song of the Siren by Amy Pond and the Doctor. Surmising the Siren is using water as a portal, the Doctor instructs the crew to seek refuge in the ship's dry magazine. There, they find Toby Avery, the son of the ship's captain
Bottle pool object balls are each occupied, respectively by the cue ball and shake bottle, the 1 ball would be placed on the center spot and the 2 ball on the head spot. The game is sometimes played with the larger and heavier (and unnumbered) carom billiard balls instead of pocket billiard balls. Such is the case at the Union Club and was also at the University of Michigan Billiards & Games Room, where the faculty devoted most of their time to bottle pool. Not incidentally three-cushion billiards, which uses these larger balls, was also a mainstay in that room and touring