Book excerpt: After tough assignments as a Canadian diplomat abroad, Nicholas Coghlan and his wife Jenny unwind by sailing Bosun Bird, a 27foot sailboat, from Cape Town, South Africa, across the South Atlantic and into the stormy winter waters around Tierra del Fuego, South America. Coghlan recounts earlier adventures in Patagonia when, taking time off from his job as a schoolteacher in Buenos Aires in the late 1970s, he and Jenny explored the region of southern Argentina and Chile over three successive summers. This time, as they negotiate the labyrinth of channels and inlets around snow-covered Fireland, he reflects on voyages of past explorers: Magellan, Cook, Darwin, and others. Sailing enthusiasts and readers of true adventures will want to add Coghlan's world-wise narrative to their libraries.