BRIGADIER GENERAL Cox in a message to Governor Pierpont dated this day at Gauley, Va., says: "The Kanawha Valley is now free from the rebel troops. Most of the forces raised by Wise in this valley left him between Charleston and this place. I had sent them assurances that if they laid down their arms they might go quietly to their homes, and many have done 80, asserting that they were cheated into the rebel service. I regret to have to say that Wise in his retreat has burned a number of valuable bridges, and carried off most of the wagons and teams belonging to the people of the valley. All parties denounce him for his vandalism. I congratulate you on the success of this expedition."-Baltimore American, Aug. 2.

July 30.-Senator Trumbull of Ohio spoke in the Senate of the United States on the Bill to suppress insurrection, and favored the approval of what had been done by the President before Congress assembled as done by the legal representative of the nation in the nation's defence. Senator Carlile spoke against the 8th section of the bill which empowers military commanders to discharge from custody prisoners who take the oath of allegiance.-(Doc. 131.) -THE Thirteenth Regiment of Massachusetts Volunteers, under the command of Colonel Samuel H. Leonard, passed through New York, on their route for Harper's Ferry, Va. The regiment numbers one thousand and eleven men, and is armed with the Enfield rifle. While on their march through the city, the troops sung several martial airs, the stanza of one of them commencing:

We'll hang Jeff. Davis on a Palmetto tree,
Glory hallelujah! Glory hallelujah !
And the Union then will be great and free,
Glory hallelujah! Glory hallelujah!

-New York World, July 31.

-GENERAL B. F. BUTLER wrote another interesting letter to the Secretary of War on the subject of the "contraband."-(Doc. 132.) -THE Fifth Regiment of Connecticut Volunteers passed though New York en route for Washington, by the way of Harrisburg, Pa. It is commanded by Colonel O. S. Terry, of Norwalk, and is splendidly equipped.

-THE Thirteenth Regiment of Brooklyn, N. Y. S. M., returned from Annapolis, Md., its term of service having expired on the 23d instant.-N. Y. World, July 31,

-FREDERICK W. LANDER was this morning appointed a brigadier-general by the President of the United States. He has command of the Rhode Island and part of the Massachusetts regiments. This appointment was made at the earnest recommendations of Gen. McClellan, Gov. Sprague of Rhode Island, and Senator Carlile of Virginia.

-SIX Government clerks in the departments at Washington, resigned to-day, owing to the passage of the Virginia ordinance, providing that any citizen of that Commonwealth holding any office under the Government of the United States after to-morrow shall be forever banished from that State, and is declared an alien and enemy; and further, any citizen who may hereafter undertake to represent the State in the Congress of the United States, in addition to the penalties above presented, shall be deemed guilty of treason and his property confiscated to the use of the State.-(Doc. 135.)

-THE Fifth Regiment of Massachusetts Militia returned to Boston from the seat of war, its time of service having expired. Delegations of military, firemen, and civic authorities from adjoining towns, which had furnished companies to the gallant 5th, were waiting during the forenoon for their arrival, and Boston poured out its thousands to greet and welcome them home. After partaking of a bountiful collation on the Common, prepared by the City Government, the regiment was mustered out of service, and the companies soon after started, under an escort of their towns-people, for their homes. Three contrabands came with the regiment; two men and a woman.

At Bull Run the regiment lost 25 killed, 26 wounded, and 5 missing. The national flag borne by this regiment bears marks of hard usage. The eagle is missing from the staff, and there are three holes in the flag, two made by bullets, and one by a fragment of a shell. This flag, at the beginning of the fight, was borne by the color-bearer, Lawrence, who was shot dead, receiving two musket balls in his breast. The bearer of the Massachusetts flag, G. W. Wallace, of the Haverhill company, was at his side, and seizing the national flag as it fell from Lawrence's hand, he for a time bore both, but at length the last-named was taken by the Sergeant-Major of the regiment, and was retained by him. The story that it was left on the field at any time is false.-N. Y. Tribune, July 31.