I have the honor to inform Congress, that I arrived here yesterday about twelve o'clock, on my return from Hartford. Some hours previous to my arrival Major General Arnold went from his quarters, which were this place, and, as it was supposed, over the river to the garrison at West Point, whither I proceeded myself, in order to visit the post. I found General Arnold had not been there during the day, and on my return to his quarters he was still absent. In the mean time, a packet had arrived from Lieut. Colonel Jameson, announcing the capture of a John Anderson, who was endeavouring to go to New York with several interesting and important papers, all in the hand writing of General Arnold. This was also accompanied with a letter from the prisoner, avowing himself to be Major John Andre, Adjutant General to the British army, relating the manner of his capture, and endeavouring to shew that he did not come under the description of a spy. From these several circumstances, and information that the General seemed to be thrown into some degree of agitation, on receiving a letter a little time before he went from his quarters, I was led to conclude immediately that he had heard of Major Andre's captivity, and that he would, if possible, escape to the enemy, and accordingly took such measures as appeared the most probable to apprehend him. But he had embarked in a barge and proceeded down the river, under a flag, to the Vulture ship of war, which lay at some miles below Stoney and Verplank's Points. He wrote me a letter after he got on board. Major Andre is not arrived yet, but I hope he is secure, and that he will be here to-day. I have been and am taking precautions, which I trust will prove effectual to prevent the important consequences which this conduct, on the part of General Arnold, was intended to produce. I do not know the party that took Major Andre, but it is said that it consisted only of a few militia, who acted in such a manner upon the occasion, as does them the highest honor, and proves them to be men of great virtue. As soon as I know their names, I shall take pleasure in transmitting them to Congress. _Paramus, October_ 7, 1780. SIR, I have the honour to enclose Congress a copy of the proceedings of a Board of General Officers in the case of Major Andre Adjutant General to the British army. This officer was executed in pursuance of the opinion of the Board, on Monday, the 2d instant, at 12 o'clock, at our late camp at Tappan. Besides the proceedings I transmit copies of sundry letters respecting the matter, which are all that passed on the subject, not included in the proceedings. I have now the pleasure to communicate the names of the three persons who captured Major Andre, and who refused to release him, notwithstanding the most earnest importunities and assurances of a liberal reward on his part. Their names are, _John Paulding, David Williams, and Isaac Van Wert._