_Certificate from Isaac Jennings and Andrew Wakeman_. Being requested by Samuel Rowland, Esq., to give information relative to the evacuation of New-York, in the year 1776, by the American army, we, the subscribers, then acting, one in the capacity of a lieutenant, and the other as a private, in the brigade commanded by the late General Silliman, now deceased, do certify, That on the fifteenth day of September (being on the Lord's day), the British landed on the east side of the island, about four miles above the city. The American troops retreated the same day to Harlem heights. By some misapprehension of the orders, or from other causes unknown to us, our brigade was left, and was taken by General Knox to Bunker's Hill, [1] a small fort (so called) about a mile from town. The fort was scarcely able to hold us all. We had but just got into the fort, when Aaron Burr, then aid-de-camp to General Putnam, rode up and inquired who commanded there. General Knox presented himself, and Burr (then called Major Burr) asked the general what he did there? And why he did not retreat with the army? The general replied, that it was impossible to retreat, as the enemy were across the island, and that he meant to defend that fort. Major Burr ridiculed the idea of defending the place, being, as he said, without provisions, or water, or bomb-proof; and that, with one mortar, or one howitzer, the enemy would take the place in four hours, or in some very short time, and again urged General Knox to retreat to Harlem heights; but General Knox said it would be madness to attempt it. A smart debate ensued, the general adhering to his opinion. Burr addressed himself to the men, and told them that, if they remained there, they would before night be all prisoners, and crammed into a dungeon, or hung like dogs. He engaged to lead them off, and observed that it would be better that one half should be killed in fighting, than all be sacrificed in that cowardly manner. The men agreed to follow him, and he led them out; he and his two attendants riding on the right flank. About four miles from town we were fired upon by a party of the enemy. Burr galloped directly to the spot the firing came from, hallooing to the men to follow him. It proved to be only a guard of about a company of the enemy, who immediately fled. Burr and his horsemen pursued and killed several of them. While he was thus employed, the head of a column had taken a wrong road. Burr came up and hurried us to the left, into a wood, and rode along the column from front to rear, encouraging the men, and led us out to the main army with very small loss.