Complex sentence: On his return to Boston, Watson found that his uncle was bankrupt, and so he took a job under a Captain John Huston on a schooner which supplied provisions to the British army at Fort Lawrence, Nova Scotia.
Split into simpler sentences: On his return to Boston, Watson found that his uncle was bankrupt. The youth took a job under Captain John Huston on a schooner that supplied provisions to the British army at Fort Lawrence, Nova Scotia.