The Folsoms continued to hold land outside Hingham, Norfolk, England, many years after leaving for the Massachusetts Bay Colony.
In 1673, John Folsom of Exeter gave his son Peter 50 acres (200,000 m2) of land in Norfolk County, England, which he had inherited from his family.
Though the partners separated in 1768, Folsom continued in foreign commerce, timber, and lumber operations for the rest of his life.
During the French and Indian War he was captain of a company in the New Hampshire Provincial Regiment during the Crown Point expedition led by Sir William Johnson in 1755.
[7] At the Battle of Lake George, his company, supported by artillery from Massachusetts, surprised and captured Baron Dieskau, the French commander-in-chief.
[8] His formal commission was revoked by Governor John Wentworth after the raid on Fort William and Mary in December 1774.
Disregarding this, Colonel Folsom marched his regiment to Portsmouth and escorted the captured cannons safely back to Durham.
Accordingly, the Continental Congress made a provision whereby all persons friendly to the cause of liberty and independence were required to associate and sign an obligation to oppose, by arms and money, the hostilities of the British.
All who refused to sign it were disarmed and watched with jealous care, and every hostile demonstration noted and reported to the Committee of Safety, which was composed of a body of men appointed by the General Assembly.
He became a close political ally of Meshech Weare and Josiah Bartlett, as he was named to the New Hampshire Committee of Safety.