Engraving of a Duplex Catamaran, built in Rhode Island USA, for Mr. Henry N. Custance, honorary treasurer of the Corinthian Yacht Club, August 1880. The engraving shows the vessel near her moorings on the River Thames at Erith. The catamaran was 33 feet long, with a draught of 3 foot, and had been recorded making 23 mph (with the tide) in the Lower Hope.