The steamship Coatzacoalcos arrived at New York this morning, bringing home the Federal troops who were left in Texas without a commander, after the treason of General Twiggs.
The Government at Washington is acting on positive information in taking all possible precautionary measures for the defence of, and the maintenance of peace at, that point. A company of military were marched inside the capitol to-night, and a picket of guards is stationed on each of the roads leading into the city. This was done on no new information, but is among the signs of the revolution. A military company has not been within the walls of the capitol before since the war of 1812. The oath of fidelity was administered to several companies of volunteers to-day.--World, April 12.
Unusual activity now prevails in military circles in Pennsylvania. New companies are forming, and the old organizations are drilling frequently. The prospect of active service in the event of the breaking out of actual hostilities in the South, is exciting much discussion among the volunteer companies, and it is understood that several have already tendered their services to the Secretary of War, in case the Government should need their aid. It is also understood that in the event of an attack on the Government, the latter will make an early call upon Pennsylvania for men. Our volunteers labor under great disadvantages in respect to arms, and in a case of emergency many more men would be forthcoming than there are arms to place in their hands.--Philadelphia Press.
This morning the Commissioners of the Confederate States left Washington. They are satisfied that no recognition of the Southern Confederacy will ever take place under the administration of President Lincoln. In their  final communication they reflect severely on the Administration, taking the ground they have exhausted every resource for a peaceful solution of the existing difficulties, and that if civil war results, on the head of the Federal Government will rest the responsibility. They charge the Administration with gross perfidy, insisting that under the shelter of the pretext and assertion that Fort Sumter was to be evacuated, an immense armada has been despatched to provision and reinforce that fort. They repeat they had almost daily indirect assurances from the Administration that Fort Sumter was positively to be abandoned, and that all the Government's efforts were to be directed toward peace. The commissioners allege that the Government at Montgomery was earnestly desirous of peace; and that, in accordance with its instructions, as well as their own feelings, they left no means unexhausted to secure that much-desired end; but all their efforts having failed, they were now forced to return to an outraged people with the object of their mission unaccomplished; and they express the firm conviction that war is inevitable.--(Doc. 51.)--World, April 12.
At 2 P. M. Colonel Chesnut and Major Lee, aids to General Beauregard, conveyed to Fort Sumter the demand that Major Anderson should evacuate that fort. Major Anderson replied at 6 P. M. that his “sense of honor and his obligations to his Government would prevent his compliance” with the demand. He informed the gentlemen verbally that he would be “starved out in a few days.” It was stated that there were at this time 7,000 men around Fort Sumter under arms, 140 pieces of ordnance of heavy calibre in position and ready for use.--Charleston Mercury.