Disguise and soften it as we may, the campaign of the Peninsula was a disastrous failure,--a failure months long, like a bad novel in weekly instalments, with "To be continued" grimly ominous at the end of every part. So far was it from ending in the capture of Richmond that nothing but the gallantry of General Pope and his little army hindered the Rebels from taking Washington. And now comes Major-General George B. McClellan, and makes affidavit in one volume[1] octavo that he is a great military genius, after all. It should seem that this genius is of two varieties. The first finds the enemy, and beats him; the second finds him, and succeeds in getting away. General McClellan is now attempting a change of base in the face of public opinion, and is endeavoring to escape the consequences of having escaped from the Peninsula. For a year his reputation flared upward like a rocket, culminated, burst, and now, after as long an interval, the burnt-out case comes down to us in this Report. [1] _Letter of the Secretary of War, transmitting Report on the Organization of the Army of the Potomac, and of the Campaigns in Virginia and Maryland under the Command of Major-General George B. McClellan, from July 26, 1861, to November 7, 1862._ Washington: Government Printing-Office. 1864. 8vo, pp. 242. There is something ludicrously tragic, as our politics are managed, in seeing an Administration compelled to print a campaign document (for such is General McClellan's Report in a double sense) directed against itself. Yet in the present case, had it been possible to escape the penance, it had been unwise, for we think that no unprejudiced person can read the volume without a melancholy feeling that General McClellan has foiled himself even more completely than the Rebels were able to do. He should have been more careful of his communications, for a line two hundred and forty-two pages long is likely to have its weak points. The volume before us is rather the plea of an advocate retained to defend the General's professional character and expound his political opinions than the curt, colorless, unimpassioned statement of facts which is usually so refreshing in the official papers of military men, and has much more the air of being addressed to a jury than to the War Department at Washington. It is, in short, a letter to the people of the United States, under cover to the Secretary of War. General McClellan puts himself upon the country, and, after taking as much time to make up his mind as when he wearied and imperilled the nation in his camp on the Potomac, endeavors to win back from public opinion the victory which nothing but his own over-caution enabled the Rebels to snatch from him before Richmond. He cannot give us back our lost time or our squandered legions; but how nice it would be if we would give him back his reputation, which has never been of any great use to us,