Nossiter and his two sons, Dick and Harold, had an epic voyage that the skipper chronicled in two books, Northward Ho and Southward Ho. In the decades that followed, Sirius led an up-and-down existence. At one point, in the mid-1980s, she was found at the bottom of a river in Cairns, Australia, from whence she was rescued and restored. Later, she served as the mother ship for surfing expeditions in Bali. Simon, who'd owned a 1923 steel barge in London, first sailed on the boat during a dive charter; about six years ago, he came across her for sale in Thailand, and he couldn't resist.