The magnitude and demonstrations of the mob had aroused great fear for the Navy Yard and the naval property of the Government, and the marine company that had been on duty with the police was recalled by Admiral Paulding for their protection; and this morning six war-vessels, carrying in all over ninety guns, shotted and trained, could be seen drawn up, so as to command every avenue to the yard, while the iron-clad battery _Passaic_ and a gun-boat lay off the Battery to protect Fort Columbus during the absence of its garrison. Marines armed to the teeth, and howitzers, guarded all the entrances to the Navy Yard. Broadway was almost deserted--no stages were running, street-cars had disappeared--only here and there shutters were taken down from the stores, and it looked like Sabbath day in the city. But at police head-quarters all was activity. The African church nearly opposite was filled with soldiers stretched on the seats and floor of the building. Another house, a few doors from the police building, was also crowded with soldiers. The owner of this empty house, having sent a flat refusal to Acton's request for the use of it, the latter quietly told the policemen to stave in the door. It took but a few minutes to send it from its hinges; and now the troops were quartered in it also; for all those in the service of the United States, under General Brown, had their head-quarters here. In the basement of the police building was the telegraph, with the wires running like nerves to every part of the city, over which inquiries and answers were continually passing. Rooms all around were filled with rations obtained from a neighboring grocery and meatmarket, taken with or without leave. On the main floor, on one side, in their office sat the weary commissioners; on the other, were Inspectors Carpenter, Dilks, and Leonard, fit, each one to be a general, while scattered around were police captains, detectives, and patrolmen. On the second story were the clerks, copyists, etc.; while the top floor was crowded with colored refugees, who had fled thither for protection. Some were standing and conversing, others sitting in groups on boxes, or walking from room to room; many of these sad and serious, as they thought of missing relatives and friends, while the colored man placed over them, with his shirt sleeves rolled up, was, with his assistants, dealing out provisions.