The saga of David Napier’s rotatory steamer, Dumbarton, on the Clyde, and his frequent references to the success of a steamer on the rotatory principle on the Severn merits investigation. Napier had moved his business dealings to London in the middle of the 1830s but by 1850, he was living in Gloucester, though he maintained connections in London and Glenshellish near Loch Eck. He also owned and fued land in the vicinity of Kilmun where had built and still owned the pier. David Napier The first attempt to bring a steamboat to the upper reaches of the Severn in 1850 appears to have had limited success.  The Star was too long for the locks and the twisting navigable channel. The improved patent suggests that the Star might have had a rotary engine. “Passenger steamer on the Severn.—A steamer has arrived in the Severn from Glasgow. She is named the Star, and is intended to trade between...