A detachment of about eleven hundred men, chosen for the purpose, was soon encamped on Cambridge Common. There were ten companies of New England infantry, some of them from General Greene’s Rhode Island regiments; three rifle companies from Pennsylvania and Virginia, one of them Captain Daniel Morgan’s famous company; and a number of volunteers; among whom was Aaron Burr, then but twenty years of age, and just commencing his varied, brilliant, but ultimately unfortunate career. The proposed expedition was wild and perilous, and required a hardy, skilful and intrepid leader. Such a one was at hand. Benedict Arnold was at Cambridge, occupied in settling his accounts with the Massachusetts committee of safety. These were nearly adjusted. Whatever faults may have been found with his conduct in some particulars, his exploits on Lake Champlain had atoned for them; for valor in time of war, covers a multitude of sins. It was thought too, by some, that he had been treated harshly, and there was a disposition to soothe his irritated pride. Washington had given him an honorable reception at head-quarters, and now considered him the very man for the present enterprise. He had shown aptness for military service, whether on land or water. He was acquainted, too, with Canada, and especially with Quebec, having, in the course of his checkered life, traded in horses between that place and the West Indies. With these considerations he intrusted him with the command of the expedition, giving him the commission of lieutenant-colonel in the continental army.