On a certain ocean liner, a passenger was lying in his cabin seriously ill. One dark night he heard a cry, “Man overboard,” and, while sensitive to all the excitement and hurry, he was too sick to give any help. One of the difficulties was that they could not see the man. Suddenly, however, a light shone out through the glass of a porthole. It happened to fall full on the struggling man in the water, so that they were able to throw him a lifebelt and then go to his rescue. Where did the