A sixteen year old rifleman from Pennsylvania, John Joseph Henry, described the initial leg of the journey from Cambridge to Quebec.
"This little army in high spirits, marched from Prospect hill near Cambridge in Massachusetts, on the 11th of September, 1775, and on the following day, arrived at Newburyport (which is formed by the waters of the Merrimac river). This place, at that time, was a small but commercial town, near the border of Massachusetts. Here we remained encamped five days, providing ourselves with such articles of real necessity, as our small means afforded."
Pvt. John J. Henry, in his memoirHenry, John Joseph, Account of Arnold’s campaign against Quebec, and of the hardships and sufferings of that band of heroes who traversed the wilderness of Maine from Cambridge to the St. Lawrence, in the autumn of 1775 (Albany: J. Munsell, 1877), pp. 12-13.