Washington, April 11, 1861.

Dear Sir:—

The letter of Twiggs is in accordance with his character, and shows how richly he deserved the epithet with which he would have been branded on the records of the country and before the world but for your forbearance. The cowardly effort to insult and wound you is worthy of one who betrayed his trust and traitorously surrendered the arms and colors of his Government. The idle threat to visit Lancaster shows that “braggart” is to be added to traitor and coward, in order to designate his full measure of infamy.

I showed your letter and the copy of Twiggs’ letter to Mr. Holt. He thought it ought to be published by you, but I do not. It would be dignifying the creature too much. I enclose a copy of his letter to Mr. Holt. You will observe that the same contemptible threat of personal vengeance is made in it. But it is gratifying to know that Twiggs feels so acutely the sting of his dismissal, and that all the whitewashing of the Confederate States affords him no relief. I have applied to the War Office for copies of the several orders relating to Twiggs, and shall probably have them to-morrow, and will forward them to you.

There is great “soldiering” in town the last two days. The yard in front of the War Office is crowded with the District Militia, who are being mustered into service. The feeling of loyalty to the Government has greatly diminished in this city. Many persons who would have supported the Government under your administration refuse to be enrolled. Many who were enrolled have withdrawn, and refuse to take the oath. The administration has not acquired the confidence and respect of the people here. Not one of the cabinet or principal officers has taken a house or brought his family here. Seward rented a house “while he should continue in the cabinet,” but has not opened it, nor has his family come. They all act as though they meant to be ready “to cut and run” at a minute’s notice—their tenure is like that of a Bedouin on the sands of the desert. This is sensibly felt and talked about by the people of the city, and they feel no confidence in an administration that betrays so much insecurity. And besides, a strong feeling of distrust in the candor and sincerity of Lincoln personally and of his cabinet has sprung up. If they had been merely silent and secret, there might have been no ground of complaint. But assurances are said to have been given and declarations made in conflict with the facts now transpiring in respect to the South, so that no one speaks of Lincoln or any member of his cabinet with respect or regard.

The facts about Sumter it is impossible to ascertain, for the reasons that have been mentioned, for no one knows what to believe. The nearest conjecture I can form is this:—

1st. That the Baltic has been sent with provisions for Sumter.

2d. That the Powhatan has been sent with forces to land and attack the batteries.

3d. That a secret expedition, independent of General Scott, has been sent, under charge of Fox, to make an effort to land in the night at Sumter.

The refusal to admit Captain Talbot to Sumter may prevent concert of action with Major Anderson, and I think the whole thing will prove a failure. There is no excitement here. People are anxious, but the sensation telegrams sent from here are without any foundation. It is true, however, that Ben McCullough has been here on a scouting expedition, and he carefully examined all the barracks and military posts in the city, and said that he expected to be in possession of the city before long. He stayed all night at Doctor Gwin’s. This has a business aspect. It is believed that a secession ordinance will be passed by the Virginia convention to-day.