found: Phillips-Birt, D. H. C. The Cumberland Fleet, 1978 (subj.)t.p. (Royal Thames Yacht Club) p. 187 (Thames Yacht Club founded 1823 by mbrs. of HM Coronation Sailing Society; becomes Royal Thames Yacht Club in 1830 when Patron, HRH The Duke of Clarence, ascends throne as King William IV)
found: The Cumberland Fleet, 1975
found: Royal Thames Yacht Club www site, 29 Feb. 2008:History page (The Royal Thames is the oldest yacht club in the United Kingdom. It was formed in 1775 when the Duke of Cumberland, brother of George III, put up a silver cup for a race on the Thames and formed the Cumberland Fleet. This remains the alternative name of the Club today)