This has nothing to do with Swallowboats, but does have a connection with sailing. The Royal Welsh Yacht Club (I hope I've got its title right) has a rather amazing 'clubhouse' in (literally in the thickness of the walls of) Caernarfon Castle. It was founded around 1850, and its first Commodore was the Marquess of Anglesea who, as General Paget, served under Wellington at Waterloo, where he lost a leg. He and Wellington were watching the course of the battle, when a stray (or deliberate?) cannon ball took Paget's leg off as he sat astride his horse next to Wellington's - it apparently missed Wellington and both horses. The following conversation is alleged to have taken place. Paget -'By Jove, sir, I believe I have lost a leg'. Wellington -'By Jove, sir, I believe you have'. (That's what an education at Eton does for you.) Well, Paget survived to a ripe old age, was given a title for his pains (literally), and became a yachtsman.
Michael