On 30 August 30 , Arnold sent a letter accepting Clinton 's terms and proposing a meeting to AndrÃ through yet another intermediary : William Heron , a member of the Connecticut Assembly he thought he could trust . On August 30 , Arnold sent a letter accepting Clinton 's terms and proposing a meeting to AndrÃ through yet another intermediary : William Heron , a member of the Connecticut Assembly he thought he could trust .