In 1817, he moved toSt. Charles, Missouri and was military storekeeper at the Jefferson Barracks, near St. Louis.
He died at Fort Bellefontaine in 1829.
John Whistler had 15 children and three became military officers. Colonel William Whistler served from 1801-1861 and Lt. George Washington Whistler, a railroad designer in America and Russia.
Two of his grandsons were officers in the Civil War: Brigadier General Joseph N. G. Whistler and Colonel Joseph Nelson Garland Whistler.
Another grandson, James Abbott McNeil Whistler attended West Point, but did not graduate. He went on to become a famous artists ("Whistler's Mother")
Quite the Military Family. --Brock-Perry