So the soldier thought he would marry. And he took a wife, and in a year's time God gave him a son, and he had nothing more to wish for except to see the son grow up and turn into a general. But it so happened that the little boy fell ill, and what was the matter with him no one knew. He grew worse and worse from day to day, and the Tzar sent for every doctor in the country, but not one of them did him a half-pennyworth of good. The doctors grew richer and the boy grew no better but worse, as is often the way. The soldier had almost given up hope of saving his son when he remembered the old devil who had signed a promise written in his own blood to serve the soldier faithfully wherever and whenever there should be need. He remembered this, and said to himself: "Where the devil has my old devil hidden himself all this time?" And he had scarcely said this when suddenly there was the little old devil standing in front of him, dressed like a peasant in a little shirt and breeches, trembling with fright and asking: "How can I serve your Excellency?" "See here," says the soldier. "My son is ill. Do you happen to know how to cure him?" The little old devil took a glass from his pocket and filled it with cold water and set it on the sick child's forehead. "Come here, your Excellency," says he, "and look into the glass of water." The soldier came and looked in the glass. "And what does your Excellency see?" asked the little old devil, who was so much afraid of the soldier that he trembled and could hardly speak. "I see Death, like a little old woman, standing at my son's feet." "Be easy," says the little old devil, "for if Death is standing at your son's feet he will be well again. But if Death were standing at his head then nothing could save him." And with that the little old devil lifted the glass and splashed the cold water over the sick child, and the next minute there was the little boy crawling about and laughing and crowing as if he had never been sick in his life. "Give me that glass," says the soldier, "and we'll cry quits." The little old devil gave him the glass. And the soldier gave back the promise which the devil had signed in his own blood. As soon as the little old devil had that promise in his hand he gave one look at the soldier and fled away as if the blacksmiths had only that minute stopped beating him on the anvil. And the soldier after that set up as a wise man and put all the doctors out of business, curing the boyars and generals. He would just look in his glass, and if Death stood at a sick man's feet, he threw the water over him and cured him. If Death stood at the sick man's head, he said: "It's all up with you," and the sick man died as sure as fate. All went well until the Tzar himself fell ill and sent for the soldier to cure him.