The population numbered only about ten thousand, one-fifth of which was negroes, who were slaves. Their education being wholly neglected, they were ignorant and debased, and addicted to almost every vice. They were, besides, restive under their bondage amid the severe punishments often inflicted on them, which caused their masters a great deal of anxiety. Not isolated as an inland plantation, but packed in a narrow space, they had easy communication with each other, and worse than all, with the reckless and depraved crews of the vessels that came into port. It is true, the most stringent measures were adopted to prevent them from assembling together; yet, in spite of every precaution, there would now and then come to light some plan or project that would fill the whites with alarm. They felt half the time as though walking on the crust of a volcano, and hence were in a state of mind to exaggerate every danger, and give credit to every sinister rumor. The experience of the past, as well as the present state of feeling among the slaves, justified this anxiety and dread; for only thirty years before occurred just such an outbreak as they now feared. On the 7th of April, in 1712, between one and two o'clock in the morning, the house of Peter Van Tilburgh was set on fire by negroes, which was evidently meant as a signal for a general revolt. The cry of fire roused the neighboring inhabitants, and they rushed out through the unpaved muddy streets, toward the blazing building. As they approached it, they saw, to their amazement, in the red light of the flames, a band of negroes standing in front, armed with guns and long knives. Before the whites could hardly comprehend what the strange apparition meant, the negroes fired, and then rushed on them with their knives, killing several on the spot. The rest, leaving the building to the mercy of the flames, ran to the fort on the Battery, and roused the Governor. Springing from his bed, he rushed out and ordered a cannon to be fired from the ramparts to alarm the town. As the heavy report boomed over the bay and shook the buildings of the town, the inhabitants leaped from their beds, and looking out of the windows, saw the sky lurid with flames. Their dread and uncertainty were increased, when they heard the heavy splash of soldiers through the mud, and the next moment saw their bayonets gleam out of the gloom, as they hurried forward towards the fire. In the meantime, other negroes had rushed to the spot, so that soon there were assembled, in proportion to the white population, what in the present population of the city would be fully 10,000 negroes.