William Beaumont (November 21, 1785 – April 25, 1853) was a surgeon in the U.S. Army who became known as the "Father of Gastric Physiology" for his research on human digestion on Alexis St.

[3] He left his home after he turned twenty-one, moved to Champlain, New York and obtained a teaching job.

"[4] From 1812 until 1815, Beaumont served as an assistant surgeon in the Army during the War of 1812, participating in the Battle of Plattsburgh.

[4] After the war ended, he started a private practice in Plattsburgh, New York, but by 1820, Beaumont had rejoined the Army as a surgeon.

Beaumont took a leave in 1821 and married Deborah "Debby" Green Platt in Plattsburgh before returning to his post.

Unable to continue work for the American Fur Company, he was hired as a servant by Beaumont.

While en route, St. Martin was ordered to stop at Fort Crawford in Prairie du Chien, Wisconsin, to serve as Beaumont's servant again.