From the memoirs of James Forsyth: He was commissioned by General Washington as Colonel in the Light Infantry of Philadelphia in the Revolutionary War and bore dispatches to the frontier to put the settlers on guard against the Indians. He also bore commissions from General Washington to William Cooke of Northumberland and others in the southern settlements of Pennsylvania.
From the Northumberland County Historical Society: There is a tradition in the Forsythe family of a visit made by General Washington to Fort Augusta accompanied by his paymaster general and aide, Lt. Col. James Loughead, whose daughter Agnes married Andrew Forsyth, who eventually settled in Danville. According to this tradition, which passed from one member of the family to another by letter, General Washington with Col. Loughead and a few others left Valley Forge and journeyed to Fort Augusta. Washington being in doubt as to the character of the defences at Sunbury, and the ability of the Commander and fully realizing if they got past Sunbury nothing could prevent the British from striking his forces in the rear. He reached the Fort towards evening, spent the night in conference with Hunter; the next day studied the entire situation through his field glasses, spent part of the next night there and left before dawn for Valley Forge, fully satisfied that Hunter was able to hold out and that there need be no fear of the British and Indians pushing on to the Schuylkill.
“The History and Genealogy of the Family of Forsyth de Fronsac: Forsyth Family of Chester County, Pennsylvania”:
“… He entered the war of the American Revolution, first as a dispatch bearer for General Washington, then as Colonel of infantry. When the British troops occupied Philadelphia in that war, Colonel Loughead’s wife, with those others who were fighting His Majesty’s troops were sent out of the city, and unfortunately compelled to bear those hardships from which event the innocent are obliged to suffer in wartime…and above all in a civil war like the American Revolution…” and by the time of the marriage of daughter Agnes to Andrew Forsyth (1780), James “…had returned to Philadelphia …”
In 1777 he was appointed Paymaster of the Militia of the City & Liberties of Philadelphia. Minutes from the Supreme Executive Council suggest that he was still holding this position in 1785. He died in 1788.