The eponymous Jim is a young, good-looking, genial, and naive water-clerk on the Patna, a cargo ship plying Asian waters. He is, we are told, "the kind of fellow you would, on the strength of his looks, leave in charge of the deck." He also harbors romantic fantasies of adventure and heroism--which are promptly scuttled one night when the ship collides with an obstacle and begins to sink. Acting on impulse, Jim jumps overboard and lands in a lifeboat,...