Fondazione Sella, Biella, Italy

‘The grandest of the early Himalayan expeditions, and also the least eccentric’: the camp of Luigi Amadeo, Duke of the Abruzzi, and his team below the west face of K2, 1909; photograph by Vittorio Sella, ‘one of the greatest of all mountain photographers,’ from Maurice Isserman and Stewart Weaver’s Fallen Giants