When she was in her forties, recovering from depression and alcoholism, Welsh poet Gwyneth Lewis decided to trade in her landlubber existence -- a house in Cardiff, Wales, and a responsible job at the BBC -- for life aboard a small yacht with her husband, Leighton, a former bosun with the Merchant Navy and now in his midsixties. After buying a yacht -- Jameeleh -- and teaching themselves to sail it (a process not without its fair share of disasters,...