Arnold learned of André's capture the following morning, 24 September, when he received Jameson's message that André was in his custody and that the papers André was carrying had been sent to General Washington. Arnold received Jameson's letter while waiting for Washington, with whom he had planned to have breakfast. He made all haste to the shore and ordered bargemen to row him downriver to where the "Vulture" was anchored, which then took him to New York. From the ship Arnold wrote a letter to Washington, requesting that Peggy be given safe passage to her family in Philadelphia, a request Washington granted. When presented with evidence of Arnold's betrayal, it is reported that Washington was calm. He did, however, investigate the extent of the betrayal, and suggested in negotiations with General Clinton over the fate of Major André that he was willing to exchange André for Arnold. This suggestion Clinton refused; after a military tribunal, André was hanged at Tappan, New York on 2 October. Washington also infiltrated men into New York in an attempt to kidnap Arnold; this plan, which very nearly succeeded, failed when Arnold changed living quarters prior to sailing for Virginia in December.