{Illustration: THE ATTACK ON THE TRIBUNE BUILDING.}

All day long a crowd had been gathering in the Park around the City Hall, growing more restless as night came on. The railroad-cars passing it were searched, to see if any negroes were on board, while eyes glowered savagely on the Tribune building. They had sought in an eating-house for the editor, to wreak their vengeance on him. Not finding him, they determined that the building, from which was issued the nefarious paper, should come down, but were evidently waiting for help to arrive before commencing the work of destruction. The mob, which Carpenter had so terribly punished in Broadway, were marching for it, designing to burn it after they had demolished police head-quarters. Their dispersion delayed the attack, and doubtless broke its force, by the reduction of numbers it caused. There seemed enough, however, if properly led, to effect their purpose, for the Park and Printing-house Square were black with men, who, as the darkness increased, grew more restless; and "Down with it! burn it!" mingled with oaths and curses, were heard on every side.

At last came the crash of a window, as a stone went through it. Another and another followed, when suddenly a reinforcing crowd came rushing down Chatham Street. This was the signal for a general assault, and, with shouts, the rabble poured into the lower part of the building, and began to destroy everything within reach. Captain Warlow, of the First Precinct, No. 29 Broad Street, who, with his command, was in the gallant fight in Broadway, after some subsequent fighting and marching, had at length reached his head-quarters in Broad Street, where a despatch met him, to proceed at once to the Tribune building. He immediately started off on the double-quick. On reaching the upper end of Nassau Street, he came to a halt, and gave the club signal on the pavement, to form column. Captain Thorne, of the City Hall, in the meantime, had joined his force to him, with the gallant Sergeant Devoursney. Everything being ready, the order to "Charge" was given, and the entire force, perhaps a hundred and fifty strong, fell in one solid mass on the mob, knocking men over right and left, and laying heads open at every blow. The panic-stricken crowd fled up Chatham Street, across the Park, and down Spruce and Frankfort Streets, punished terribly at every step. The space around the building being cleared, a portion of the police rushed inside, where the work of destruction was going on. The sight of the blue-coats in their midst, with their uplifted clubs, took the rioters by surprise, and they rushed frantically for the doors and windows, and escaped the best way they could. In the meantime, those who had taken refuge in the Park found themselves in the lion's jaws. Carpenter had hardly rested from his march up Fifth Avenue to Mayor Opdyke's house, when he, too, received orders to hasten to the protection of the Tribune building. Taking one hundred of his own men, and one hundred under Inspector Folk, of Brooklyn, who had been early ordered over, and been doing good service in the city, he marched down Broadway, and was just entering the Park, when the frightened crowd came rushing pell-mell across it. Immediately forming "company front," he swept the Park like a storm, clearing everything before him. Order being restored, Folk returned with his force to Brooklyn, where things began to wear a threatening aspect, and Carpenter took up his station at City Hall for the night.

This ended the heavy fighting of the day, though minor disturbances occurred at various points during the evening. Negroes had been hunted down all day, as though they were so many wild beasts, and one, after dark, was caught, and after being severely beaten and hanged to a tree, left suspended there till Acton sent a force to take the body down. Many had sought refuge in police-stations and elsewhere, and all were filled with terror.

The demonstrations in the lower part of the city excited the greatest anxiety about the Government buildings in that section—the Custom House and Sub-treasury were tempting prizes to the rioters. General Sandford, commanding the city military, had sent such force as he could collect early in the day to the arsenal, to defend it; for, should the mob once get possession of the arms and ammunition stored there, no one could tell what the end would be. United States troops also were placed in Government buildings to protect them. Almost the last act of the mob this evening was the burning of Postmaster Wakeman's house, in Eighty-sixth Street. Mrs. Wakeman was noted for her kindness to the poor and wretched, who now repaid her by sacking and burning her house. The precinct station near by was also destroyed.

In the meanwhile, an event happened which threatened to disarrange all the plans that had been laid. Military etiquette often overrides the public good, and here, at this critical moment, General Wool chose to consider that, as General Sandford was Major-general, though not in the United States service, he, therefore, ranked Brigadier-general Brown of the regular army, and required him to act under the other's orders. This, Brown promptly refused to do, and asked to be relieved, telling General Wool that such a proceeding was an unheard-of thing. That he was right the order below will show {Footnote: {GENERAL ORDER No. 36.} WAR DEPARTMENT,

Adjutant-general's Office, Washington, April 7th, 1863.

6. The military commander's duties in reference to all troops and enlisted men who happen to serve within the limits of his command will be precisely those of a commanding officer of a military post.

The duties of military commanders above defined, will devolve in the City of New York, and the military posts in that vicinity, on Brevet Brigadier-general H. Brown, Colonel Fifth U. S. Artillery.

By order of the Secretary of War, (Signed) L. THOMAS, Adjutant-general.} that his troops must be under his own command, as he was responsible for their action to the Government, and Sandford was not. Wool, however, continued obstinate, and a total disruption seemed inevitable. Mayor Opdyke, President Acton, Governor Seymour, with several prominent American citizens, were present, and witnessed this disagreement with painful feelings. They knew that it would work mischief, if not paralyze the combined action they hoped to put forth in the morning. General Brown, finding Wool inflexible, turned away, determined to retire altogether. The Mayor and others followed him, and begged him not to abandon them in the desperate strait they were in—to think of nothing but saving the city. General Brown had been too hasty, sticking on a point of mere etiquette, with, perhaps, too much tenacity. True, an officer must insist on his rank as a rule, but there are emergencies when everything of a personal nature must be forgotten—crises where it may be an officer's duty to serve in any capacity, however subordinate, and trust to being righted afterwards. Luckily, General Brown, on a sober second thought, took the proper view, and returned to General Wool, and asked to be reinstated in his command, but giving him to understand that, though he would co-operate in every possible way with General Sandford, he still must retain distinct and separate command of his own troops. This was right, and whether General Wool perfectly understood the arrangement, or seeing how deeply the gentlemen present felt on the subject, chose not to press a mere point of etiquette, does not appear. We only know that if General Brown had given up the command of his troops, the results to the city would have been disastrous.