STEPHEN W. GAINES, sworn, says:—I am a counsellor at law, residing at No. 180 East Broadway; on Thursday evening last, I was at the corner of Astor-Place and Lafayette-Place; I stood upon a pile of boards; I stood there from half-past eight o’clock until after the last discharge of musketry; from the place where I stood, I had a fair view of the Opera House; when I first got there, the space between us and the theatre was filled with people, but not densely crowded at that time; I saw persons throwing stones at the principal entrance, and at the windows of the Opera House; they were nearly in front of the Opera House; sometimes a single stone, and at other times a volley; about fifty feet in front of the house was the principal scene of action; the street toward the Bowery was filled with people; there were no stones thrown from the quarter where I stood, and there were so few actually stoning the house, that it was a surprise to those witnessing it why the police did not stop it; the first I saw of the military was the horse, and then followed the infantry; they came from Broadway, passed the Opera House in Astor-Place, and took their stand near the 4th avenue; I saw no opposition; in about half an hour I saw the horse troops pass up Astor-Place, towards Broadway; I should have left upon the arrival of the military, but so many coming upon the sidewalk, I could not get out; within a short time after, the infantry passed up in front of the house; I saw the fire from the discharge of the muskets as it left the barrels, as the lamps were out; some of them were fired perpendicular, some on an inclined plane towards the house of Mrs. Langdon, and others horizontally; this was the first discharge; we had no intimation of firing where I stood, until I saw the flash; several other volleys were discharged immediately; previous to firing the last volley, the street was nearly cleared; most of the people had left the enclosure where I was; there were, perhaps, half a dozen on the sidewalk in front of where I was; I was still standing on the board, when the last discharge took place up Astor-Place towards the Bowery; between me and the soldiers the space was clear; there was a small number of persons on the corner opposite Mrs. Langdon’s house; they were out of the range of the fire; this fire was nearly in the range of where I was standing; I stepped back a pace or two, to bring myself out of the direct line; immediately another discharge took place, that being part of the previous discharge; upon the discharge, a man fell upon the sidewalk in front of us; there were but a few persons near him at the time; after he fell, he remained on the ground half a minute, some supposed he was shamming being shot; on picking him up, a wound was discovered in his back, by the blood running; we took the wounded man down to