Major John André, an aide-de-camp of Clinton, and adjutant-general of the British army, was selected as the person to whom the maturing of Arnold's treason, and the arrangements for its execution should be entrusted. A correspondence was carried on between them under a mercantile disguise in the feigned names of Gustavus and Anderson; and at length, to facilitate their communications, the Vulture, sloop-of-war, moved up the North river and took a station convenient for the purpose, but not so near as to excite suspicion. The time when Washington met Rochambeau at Hartford was selected for the final adjustment of the plan, and as a personal interview was deemed necessary André came up the river and went on board the Vulture. The house of a Mr. Smith, without the American posts, was appointed for the interview, and to that place both parties repaired in the night--André being brought under a pass for John Anderson in a boat dispatched from the shore. While the conference was yet unfinished, daylight approached, and to avoid discovery Arnold proposed that André should remain concealed until the succeeding night. They continued together during the day, and when, in the following night, his return to the Vulture was proposed, the boatmen refused to carry him because she had shifted her station during the day, in consequence of a gun which was moved to the shore without the knowledge of Arnold and brought to bear upon her. This embarrassing circumstance reduced him to the necessity of endeavoring to reach New York by land. To accomplish this purpose, he reluctantly yielded to the urgent representations of Arnold, and laying aside his regimentals, which he had hitherto worn under a surtout, put on a plain suit of clothes and received a pass from Arnold, authorizing him, under the name of John Anderson, to proceed on the public service to White Plains or lower if he thought proper.