The Negley Zouaves, Capt. O. M. Irvine, were assigned to the 3d Regiment, of which Capt. Irvine was chosen Major; 1st Lieut. Lawson succeeding to the Captaincy.  
                                                      
The Alliquippa Guards, Capt. Snider, were attached to the 14th Regiment, Col. John W. Johnston.                      

While these companies were recruiting, the community was in a constant whirl of excitement. Public buildings, stores, and even private houses were profusely decorated with flags of all sizes and qualities. Private subscrptions for the benefit of individuals and companies were raised liberally--amounting in the aggregate to thousands of dollars. Revolvers, swords, bowie knives, sashes, and other weapons and military decorations were presented by hundreds, individuals, companies, and corporations vieing with each other in liberality. By the efforts of a few individuals, in some instances, whole companies were uniformed; but we regret to say, the materials and make, in some cases, soon proved to be of the shabbiest character. Thus several companies of the three months volunteers were twice supplied with clothing within a few weeks; once before leaving home, and again by the State, with "shoddy" suits, and both of such miserable materials as to fall to pieces before the campaign had fairly commenced, causing much needless suffering among the raw recruits.

During this period of excitement, the ladies took their full share of labor, sewing gratuitously for the soldiers, making lint and hospital supplies, and providing such delicacies as their means permitted. Hundreds of havelocks were made, but the discovery that the white colored stuff of which they were made had an injurious effect on the eyes of the rear rank men, put a sudden stop to the manufacture. Private subscriptions were raised to provide means both for the outfitting of the volunteers and for the defence of the city. Messrs. Knapp, Rudd & Co., of the Fort Pitt works, generously tendering the heavy ordnance for the purpose.

Departure of Allegheny County Troops.

On the 24th of April--eleven days after the President called for 75,000 men--the last detachment (excepting two companies) of the 12th and 13th Regiments, left for Harrisburg. At an early hour in the day the troops mustered and repaired to the East Common, Allegheny, where a grand review had been announced to come off. A slight rain had been falling, which increased to a heavy shower as the review was about commencing, and continued without intermission, interfering greatly with the Commanding General's arrangement for a grand demonstration. The review did not come off, the soldiers instead plodding their way through the muddy streets and torrents of rain, to the railroad depot, which they reached in dilapidated plight, the column marching through Western avenue, Ohio and Federal streets to the river, across the Suspension bridge, up St. Clair and Fifth streets to Smithfield, thenc to Sixth and down to Liberty, where three trains, consisting of thiry-three cars, were in waiting to transport them to the State Capital. On the route a beautiful silk flag was presented to the 12th Regiment by the ladies of Allegheny, and received by Capt. R. Biddle Roberts, of the U. S. Zouave Cadets. This demonstration took place at the house of Wm. Bagaley, Esq., on Western Avenue.

Before the troops reached the trains, the arrangements for supplying a comfortable lunch were perfected. A day's rations of bread and meat had been placed on each man's seat, and his tin cup filled with excellent coffee, most gladly welcomed by the soldiers after their trudge through mud and rain. In Kier's warehouse, near the depot, a table was bountifully supplied, and but few failed "to pay their respects" to it. Credit for this timely supply of comfort for the inner man is due mainly to the citizens who subsequently organized the Subsistence Committee, of which we will hereafter speak.

About twelve o'clock, m., the first (and largest) trian moved off amid the most enthusiastic demonstrations, waving of handkerchiefs from the windows and housetops, and deafening cheers from the spectators, all cheerfully responded to by the men in the cars. At least ten thousand people had collected to wave farewell to the "gallant three monthsters." The smaller trains followed the first at brief intervals, and the crowd was not cleared off until long after the first car was out of sight.

The first train arrived at Huntingdon at half-past six p. m., and simultaneous with its arrival the soldiers were besieged by citizens bearing baskets of boiled eggs, sandwiches, crackers, cheese, hot coffee, &c. The second and third trains stopped at Altoona, and the men were there fed at the expense of the Government.

The trains arrived at Harrisburg between one and two o'clock on the morning of the 25th, and the men were quartered in churches and in the capitol. On the afternoon of the same day the regiments were mustered into the service of the United States, on the square fronting the State Capitol on each side of which the 12th and 13th regiments were formed in line. After the ceremony, Gov. Curtin passed in review.

Col. Campbell's regiment, the 12th, left the same evening for "Camp Scott," at York, and Col. Rowley's left on the following day for the same destination.