That September, not realizing that Arnold was in league with the enemy, Washington enjoined him to improve West Point’s defenses. Arnold pretended to embark on a whirl of improvements at the fortress, while continually weakening them. He made it seem as if hundreds of men were hard at work when mere dozens were enlisted. When Washington alerted Arnold that he would pass through the Hudson Valley on the way to Hartford—“I want to make my journey a secret,” Washington stressed—Arnold relayed this letter to his British accomplices, listing places Washington would spend the night.45 Had the letter
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