 The "Kate" was a double-ended design which later operated from Penarth beach.The "Harlequin" of 1868 was the first tug design with twin screws, which provided superior towage control and had advanced engine arrangements for their day.The same year, John Payne completed two river steamers for Brazil, the "Corruipe" and "Mondahu", steel twin-screw vessels of 200 t and the largest vessels yet built by the yard.