Cornwell’s painting is set at Fort Crawford, in Michigan…

““Cornwell’s painting is set at Fort Crawford, in Michigan Territory, during St. Martin’s second stint in Beaumont’s employ, around 1830. At this stage in his digestive explorations, Beaumont had been trying to determine whether the gastric juice would work outside of the stomach, removed from the body’s “vital force.” (It does.) He filled vial after vial with St. Martin’s secretions and dropped in all manner of foods. The cabin became a kind of gastric-juice dairy. Beaumont, in the painting, holds one end of a length of gum elastic tubing in St. Martin’s stomach; the other end drips into a bottle in Beaumont’s lap. I spent a good deal of time staring at this painting, trying to parse the relationship between the two. The gulf between their stations is clear. St. Martin wears dungarees worn through at the knees. Beaumont appears in full military dress—brass-buttoned jacket with gold epaulettes, piping-trimmed breeches tucked into knee-high leather boots. “True,” Cornwell seems to be saying, “it’s an unsavory situation for our man St. Martin, but look, just look, at the splendorous man he has the honor of serving.” (Presumably Cornwell took some liberties with the costuming in order to glorify his subject. Anyone who works with hydrochloric acid knows you don’t wear your dress clothes in the lab.)””

— Mary Roach