YOU, my son, have heard, and perhaps read, how Rome was once saved by a goose. There were, as you know, my son, a great many geese abroad during the siege of Washington; but it was not through any act of theirs that the city was saved. As I love you dearly, my son, so is it my first desire to instruct you correctly on all subjects in which the good of our great country is concerned. Before concluding my history of this remarkable siege, I shall prove to your satisfaction that Washington was saved, and the fate of the nation determined, by a barrel of whisky.Let me say to you, my son, that the siege of Washington, however much people abroad may laugh at it, was one of the most extraordinary events in the history of modern warfare. It took place in the year of our Lord, 1864; and there is no other event in the war of the great rebellion to compare with it. You will, therefore, my son, understand why it is that the history of an event of so much importance should be written only by an impartial historian-one who has courage enough to tell the truth, and no official friends to serve at the expense of honor. I must tell you, also, my son, that the great military problem of this siege has afforded a subject of deep study for our engineers, from General Delafield downward, who have puzzled their wits over it without finding a solution.