It was in the dark hour before the arrival of French aid that treason entered into the heart of Benedict Arnold, the commander of the all-important lines upon the Hudson. Arnold had been one of the best of the American commanders, perhaps the most daring of them all. He had reason to complain of slights and wrongs, not at the hands of Washington who valued and trusted him, but at the hands of the politicians. He seems to have despaired of the revolutionary cause and to have shrunk from the Fr...