On August 30, Arnold sent a letter accepting Clinton's terms and proposing a meeting to André through yet another intermediary: William Heron, a member of the Connecticut Assembly he thought he could trust. Heron, in a comic twist, went into New York unaware of the significance of the letter, and offered his own services to the British as a spy. He then took the letter back to Connecticut, where, suspicious of Arnold's actions, he delivered it to the head of the Connecticut militia. General Parsons, seeing a letter written as a coded business discussion, laid it aside. Four days later, Arnold sent a ciphered letter with similar content into New York through the services of a prisoner-of-war's wife. Eventually, a meeting was set for 11 September near Dobb's Ferry. This meeting was thwarted when British gunboats in the river, not having been informed of his impending arrival, fired on his boat.