During 1826 and 1827, Dr. Beaumont was stationed at Fort Howard in Green Bay, Wisconsin. In 1828 he was transferred to St. Louis, Missouri. While en route, St. Martin was ordered to stop at Fort Crawford in Prairie du Chien, Wisconsin, to serve as Dr. Beaumont's handyman again. In early 1831, Dr. Beaumont conducted another set of experiments on St. Martin's stomach, ranging from the simple observation of normal digestion to the effects that temperature, exercise and even emotions have on the digestive process.