In July, 1780, General Arnold had been placed in command of West Point; two months later he was safe on board the British sloop-of-war, Vulture. He had attempted to betray his country; he received in exchange six thousand pounds sterling, together with a brigadiership in the British Army.
From the time he left Philadelphia until the morning of his flight he had kept up a continual correspondence with John Anderson. Information was at length conveyed to him that Sir Henry Clinton was in possession of advices that the American Commander-in-chief contemplated an advance on New York by way of King's Bridge. Clinton's scheme would allow the army of General Washington to move upon the city, having collected all his magazines at the fortification at West Point, but at a given moment Arnold was expected to surrender the fort and garrison and compel the army of Washington to retire immediately or else suffer capture in the field.
Still Arnold felt that everything was not quite settled between Sir Henry and himself, and wrote accordingly, advising that a written guarantee be forwarded or delivered in person to him by an officer of Sir Henry's staff of his own mensuration. He was informed by way of reply that the necessary meeting might be arranged, and that the emissary would be the Adjutant-General of the British Army.
Accordingly the British sloop Vulture moved up the river as far as Stony Point, bearing the Adjutant-General. Arnold had fixed on the house of Joshua Smith as the place for the meeting. On the night of the twenty-first of September, he sent a boat to the Vulture which brought the emissary shore. In a thick grove of cedars, in the shroud of the blackest night, Arnold waited the return of the rowboat, its oars muffled with sheepskins, its passenger on board. The latter sprang lightly to the shore, his large blue watchcoat and high boots alone visible. As he climbed the bank and approached the grove, he threw back his cloak and revealed the full British uniform of a general officer.
"Anderson?" Arnold exclaimed. "You?"
"No! André, Major André," was the reply.
"Hm! I thought as much. I suspected you from the moment I met you in Philadelphia."
"Come. Let us finish. I must return before daybreak."
"Where is your disguise? I advised you to come in disguise."