The ball runs freely on the cord when the cord is held vertically. However, the magician can make the ball stop at any point along the cord called out by the audience. The label on the box lid includes the letters L. and D. for Lewis Davenport. A label on the bottom of the box says ‘A.W. Gamage Ltd, Holborn, London’, so this trick would have been supplied to Gamages by Davenports. Gamages was a major customer for Davenports wholesale business.