Washington left all of his estates to his wife for life; after her death they were to be divided between his nephews and nieces, and Mrs. Washington's grandchildren. He made his nephew, Bushrod Washington, his principal heir, leaving Mount Vernon to him. He said that he did this partly because he had promised the young man's father, his brother, John Augustine, when they were bachelors, to leave Mount Vernon to him in case he should fall in the French war. He willed that all his negro slaves should be set free on the death of his wife. He said that he earnestly wished that it might be done before this, but he feared it would cause trouble on account of their intermarriages with the dower negroes who came to Mrs. Washington from her first husband, and whom he had no right to free. He willed also that such should be comfortably clothed and fed by his heirs. To his five nephews he left his swords, with the injunction that they were "not to unsheath them for the purpose of shedding blood, except it be in self-defense, or in defense of their country and its rights; and in the latter case to keep them unsheathed, and prefer falling with them in their hands to the relinquishment thereof." Washington's life is an open book. He knew that he was making history, and he kept careful copies of all his most important letters and writings, so that it is impossible that there should be doubts on any very important point. So jealous was he of his own honorable reputation, that his last act as President was to file a denial of the authenticity of some spurious letters which were attributed to him by his political enemies. These letters were first published during the Revolution by the English, and purported to be written by Washington to Lund Washington, to Mrs. Washington, and to John Parke Custis. The person who wrote them knew something of Washington's private affairs, but he made the American general say things which represented him as opposed to the independence of the colonies. It was asserted that Washington in his retreat from New York left his servant Billy behind, and that these papers were found in a handbag which the valet carried. As it was well known in the army that Billy had never been captured, Washington did not then think it needful to deny having written these letters; but when they were brought forward again by his enemies during the last years of his Presidency, he was alarmed lest they should go down to history as his own. Most of Washington's writings which are preserved show him to us only as a grave public character, and lives of Washington drawn mainly from this source are apt to make the great man seem unnaturally cold, dignified, remote, and impressive. So usual has this view of Washington become, that there is a common belief that he never laughed aloud--a belief which there are many stories to refute.