From Washington

Special to the Chicago Tribune.

WASHINGTON, March 13.

Leonard F. Ross, Col. of the 17^th Illinois, and Capt. Ricketts, of the 1^st U. S. artillery, (the latter of whom was imprisoned some time at Richmond,) have been nominated Brigadier Generals.

A sub-committee of the conduct of the war committee visit Manassas to-day, to investigate the actual condition of that place, with a view to discover the enemy’s strength and defenses at the time when our Generals were still hesitating.

It is ascertained that a citizen of Massachusetts made the first advance on the rebel strongholds on Sunday morning.  Roving beyond our lines, he gradually neared Centerville, and seeing no enemy, he boldly marched within the entrenchments and contemplated with surprise the wooden guns with black mouths mounted there.  He pushed on to Manassas, and “occupied” both places until Monday, when he turned them over to the four corps d’armee.  His testimony has been taken by the conduct of the war committee.

Garrett Davis made almost a disunion speech in the Senate yesterday, on the bill for the abolition of slavery in the District of Columbia, saying that Kentucky should be a “La Vendee” before she would submit to see slavery touched even in the cotton States by unconstitutional legislation or any other.  Mr. Hale, of N. H., continued the debate.

Mr. Wilson, of Iowa, from the House judiciary committee, reported a bill reorganizing the Supreme Court, as an amendment to the Senate bill.  The eighth circuit consists of Indiana, Illinois, Wisconsin; the ninth of Minnesota, Iowa, Missouri and Kansas.

Negroes are flocking in from Virginia by the hundreds.  It is estimated that at least one-tenth of the servile population of this section are freed by the retreat of the rebels.  All entertain the notion that their freedom follows the advance of our armies.  One gang of twenty-five arrived this morning.

All who were at Centreville agree that there was only a shadow of an army there.  No heavy guns were ever mounted except wooden ones.  The entrenchments on their flank and rear were feeble.  The railroad to Manassas is of poor construction.  Trees are cut down so as to disclose the plains of Manassas.  Part of the huts were burned; part were standing.  Among the spoils remaining were thousands of hides.  A deserter says that a regular mail from Washington via Alexandria, came twice or thrice weekly.

The House to-day discussed the first and second sections of the tax bill, the question whether any mode of collection through State machinery was practicable.  No vote was taken, but the inclination of the House seemed to favor collection by the United States.

Senator Grimes, of Iowa, made a vigorous and eloquent speech on the resolution giving thanks to Flag Officer Foote.  He was listened to with marked attention, and enforced congratulations from Senators of all shades of opinion.  He gave the Western navy its due – showed by documentary evidence that the credit of the plan of attack on Forts Henry and Donelson belonged to Capt. Foote, and that he would have taken Nashville the week before Buell did; and thus saved valuable stores, if he had been permitted by Gen. Halleck.  Mr. Grimes, enlarged upon the value of a navy to a free people, and incidentally alluded to the Monitor and the Merrimac fight as showing the value of iron-clad vessels, whose construction he (Grimes) had urged since he took his seat in the Senate.  He had also paid a handsome tribute to Lieut. Worden and Capt. Ericson.

The bill organizing the Territory of Arizona attaches the Wilmot Proviso to that and to all other Territories hereafter organized.  Ashley’s Territorial bill was defeated yesterday by the absence of Republicans.  Wilkinson will introduce the same bill from the Senate Territorial Committee, and it will probably come down to the House.

– Published in The Davenport Daily Gazette, Davenport, Iowa, Saturday Morning, March 15, 1862, p. 1