Previous to her marriage, Mrs. Arnold had been acquainted with Major Andre, and had corresponded with him after that event, and after his removal with the British forces to New York. Acquainted with this correspondence, Arnold took the opportunity presented by it to address, unknown to his wife, letters to Sir Henry Clinton, through Andre, under the signature of _Gustavus_, and Andre replied under the assumed name of _John Anderson_. This correspondence had been carried on for months before Arnold's appointment to West Point. For a time, Clinton was at a loss to imagine the real character behind the curtain; but, at length, he became convinced that it could be no other than Arnold himself. Hitherto, that general had treated _Gustavus_ with cautious indifference, but no sooner was Arnold promoted to the command of West Point, than Clinton was ready to enter into negotiation with him to surrender that fortress into the hands of the British, and almost at any price which Arnold might choose to name. The first plan devised for bringing about an interview between Arnold and Andre failed, but a second proved more successful. The Vulture, a sloop-of-war, with Colonel Robinson on board, came up the river about the 16th of September. On their arrival at Teller's Point, Robinson, who was a tory, and whose property had been confiscated by the state of New York, addressed a letter to _General Putnam_, relating to the recovery of his property, and forwarded it under cover of a letter to Arnold by a flag-boat. Putnam was known not to be in that quarter, but the letter to him served as a pretext to enable Robinson to communicate a plan, by which an interview could be effected. Arnold, by means of consummate art and duplicity, had engaged a Mr. Smith, a man of respectable standing, to go on board the Vulture, and convey a gentleman there to the American shore, who would impart intelligence to him of the greatest importance to the American cause. Smith had been employed in procuring intelligence from time to time from New York for Arnold's predecessor at West Point, and at length consented to perform the service solicited by Arnold; and, that his family might not be privy to the transaction, they were removed to Fishkill, under pretence of a visit to some friends. Thus matters were arranged; and on the night of the 21st, Smith, with two oarsmen, bribed to secresy by the promise of fifty pounds each, left the American shore, and proceeded, as related in the commencement of this account, to the Vulture.