Conclusion. In Bismarck, N.D., items include a Santa Claus oil and advertisement by Hadden Sundblom, who painted Coca-Cola's Santa paintings from about 1931 to '65; a 1778 letter from George Washington; and two Irish dragoon swallowtail guidon flags that were used in the Battle of Nashville. Also: Plains Indian ledger drawings are examined during a visit to the State Historical Society of North Dakota