Sheridan’s column is said to be at Ashland, and Grant is reported to be sending swarms of troops to the north side of the river, below, “in countless thousands.”

The President’s message, for the completion of which Congress was desired to remain, has been sent in. I will preserve this splendidly exordiumed and most extraordinary document. It is a great legal triumph, achieved by the President over his enemies in Congress, and if we are permitted to have more elections, many obnoxious members will be defeated, for the sins of omission and commission. The President strikes them “between wind and water,” at a time, too, when no defense would be listened to, for he says the capital was never in such danger before, and shows that without prodigious effort, and perfect co-operation of all branches of the government, the cause is lost, and we shall have negro garrisons to keep us in subjection, commanded by Northern officers. He will have the satisfaction, at least, of having to say a portion of the responsibility rested with his political opponents. Mr. Benjamin, who is supposed to have written a portion of the message, was very jubilant yesterday, and it is said the President himself was almost jocund as he walked through the Capitol Square, returning home from his office.

It is now rumored that a French agent is in the city, and that the President, besides his message, sent to Congress a secret communication. I doubt—but it may be so.

Gen. Hood is here, on crutches, attracting no attention, for he was not successful.

Judge Campbell, Assistant Secretary of War, said to Mr. Wattles, a clerk, to-day, that we were now arrived at the last days of the Confederacy. Mr. Wattles told me that the judge had been convinced, as far back as 1863, that the cause was nearly hopeless.

Some 1200 of Fitz Lee’s cavalry passed through the city at 2 p.m. Gen. Longstreet has been ordered by Gen. Lee to attack Sheridan. He telegraphs back from north of the city that he “cannot find them,” and this body of cavalry is ordered to reconnoiter their position. I know not how many more men Fitz Lee has in his division, but fear at least half have passed.

March 16th.—Clouds and sunshine; warm. Splendid rainbow last evening.

We have nothing new in the papers from any quarter. Sheridan’s position is not known yet, though it must be within a short distance of the city. There was no battle yesterday. Sheridan reports the killing of Commodore Hollins, and says it was done because he attempted to escape at Gordonsville.

Sherman’s march through South Carolina is reported to have been cruel and devastating. Fire and the sword did their worst.

Congress, the House of Representatives rather, yesterday passed a bill suspending the privilege of the writ of habeas corpus. The Senate will concur probably. Also the President’s suggestion amending the Conscript act has been passed. The President has the reins now, and Congress will be more obedient; but can they save this city? Advertisements for recruiting negro troops are in the papers this morning.