General Wool, also, during the afternoon, while the rioters were having it all their own way, sent an officer to the adjutant-general of General Brown, commanding the troops in garrison in New York harbor, ordering up a force of about eighty men immediately. General Brown, on his way from his office to Fort Hamilton, was informed by Colonel Stinson, chief clerk, that a serious riot was raging in the city, and that General Wool had sent to Fort Hamilton for a detachment of some eighty men, and that a tug had gone for them. Surprised at the smallness of the number sent (he was, by special orders of the War Department, commandant of the city, and commander of all the forts and troops in the harbor except Fort Columbus), he immediately ordered the company at Fort Wood to the city, and sent a tug for it. He then made a requisition on the quartermaster for transportation of all the other companies, and proceeded without delay to Fort Hamilton. General Brown's office was close to General Wool's; but he did not think proper to consult him on the movement. General Brown, immediately on his arrival at Fort Hamilton, directed that all the troops there, as well as at Forts Lafayette and Richmond, be got in readiness to move at a moment's notice, and also that a section of artillery be organized, in case it should be wanted. Having taken these wise precautions he hastened up to the city, and reported to General Wool. The result proved the wisdom of his forecast. A new order was at once dispatched for the remaining troops, and just at twilight, Lieut. McElrath saw two steamers making directly for the fort. They were hardly fastened to the dock, when an officer stepped ashore and handed him an order from General Brown to send up at once all the efficient troops in the forts, and have their places supplied as best he could with some volunteer artillery companies. The reports coming in to police head-quarters had shown that it was no common uprising of a few disaffected men to be put down by a few squads of police or a handful of soldiers. The Mayor, after consulting with the Police Commissioners, felt that it was the beginning of a general outbreak in every part of the city, and by his representations persuaded General Wool to apply to Rear-admiral Paulding, commanding the Navy Yard, for a force of marines, and eventually to Colonel Bowman, Superintendent of West Point, and also to the authorities of Newark, and Governors of New York, New Jersey, Massachusetts, Connecticut, and Rhode Island for troops. General Brown, after reporting to General Wool, repaired to police head-quarters, which he adopted as his own, and issued the following order: "HEAD-QUARTERS, NEW YORK, July 13, 1863. "In obedience to the orders of the Major-general commanding the Eastern Department, the undersigned assumes command of the United States troops in this city.