At about five o'clock, it was ordered by Sandford, with an infantry force of one hundred and fifty, to corner of Twenty-seventh Street and Seventh Avenue, to quell a mob assembled in large numbers at that point, and which were gutting, and plundering, and firing houses. As they approached, they saw flames bursting from windows, while, to complete the terror of the scene, the body of a negro hung suspended from a lamp-post, his last struggle just ended. At the same time that the military arrived, firemen, who had come to put out the fire, reached the spot in another direction. One portion of the mob immediately took shelter behind the latter, so that the troops dared not fire and clear the streets, while another ran up to the house-tops, armed with guns and pistols, for the purpose of firing into the ranks below. The colonel told his men to keep a sharp lookout, and at the first shot fire. Scores of guns were immediately pointed towards the roofs of the houses. In the meantime, from some cause not fully explained, the imposing force, after this demonstration, marched away, leaving the mob in full possession of the field. It had hardly reached the protection of the arsenal again, when the plundering and violence recommenced; and in a short time two more negroes were amusing the spectators with their death throes, as they hung by the neck from lamp-posts. This was the second expedition sent out by Sandford, the commander-in-chief of the military, during the riot. Towards evening word was brought to the Seventh Regiment armory that the mob had gathered in great force in First Avenue, between Eighteenth and Nineteenth Streets.