André was captured near Tarrytown, New York on Saturday, 23 September by three Westchester militiamen. They found the papers exposing the plot to capture West Point and passed them on to their superiors, but André convinced the unsuspecting Colonel John Jameson, to whom he was delivered, to send him back to Arnold at West Point—but he never reached West Point. Major Benjamin Tallmadge was a member of the Continental Army's Culper Ring, a network of spies established under Washington's orders, and he insisted that Jameson order the prisoner to be intercepted and brought back. Jameson reluctantly recalled the lieutenant who had been delivering André into Arnold's custody, but he then sent the same lieutenant as a messenger to notify Arnold of André's arrest.