he negotiated with the british through intermediaries, and those intermediaries report to sir henry clantonr a long time clanton didn't know who it was that the intermediaries were talking to. he assumed it was an important american who might be willing to commit treason. it is not until august of 1780 that arnold makes the decision to turncoat, and what happens in august of 1780, in august of 1780, cornwallace scored a huge victory over an american army at camden in south carolina, an army commanded by horatio gates. it was the fourth american army in 20 months that had been destroyed in the southern theater, and more than 8,000 american troops had been killed, wounded or captured in those four engagements. that's the same month that washington writes that letter saying i've almost ceased to hope, and it is the same month that arthur lee in boston is saying that many of the leaders in massachusetts now believe the war's going to end in a negotiated settlement, short of independence, so i think you can argue that when arnold finally makes his final decision to turncoat in august of 1780, he