Kenneth purchased a car from his local dealership, Quartent Cars. However, since the car was not available in the color that Kenneth favored, the sales contract stipulated that Kenneth could immediately pick up the car of his preferred color from a nearby warehouse. The warehouse was owned by Mr. Henderson. Kenneth received the document of title for the car upon payment and presented it to Mr. Henderson a week later. But Mr. Henderson informed Kenneth that the car was damaged during a fire at the warehouse. What role does Mr. Henderson fulfill in the contract?\