American variety star rides a speedboat up and down the River Thames.
Titles read: "Camera Interviews - WILL MAHONEY - The famous American Variety Star."
Various shots of American comedian Will Mahoney in a white boiler suit and bowler hat launching a small speed boat on the River Thames (?). He gets some men to help him, then lights his cigar and starts up the outboard motor. We see him speeding up and down the river in the boat. He then wades through the water and pulls the boat in, with the help of a man in trunks. He says to the camera that he's had a grand afternoon