THE GHOST RIVER CALEDONIA IN THE OREGON NEGOTIATION OF 1818. Published by Frederick Merk, American Historical Review, U.S.A., 1950.
 
Reprinted from The American Historical Review, Volume 55, Issue 3, April 1950, Pages 530–551.

Blue cover with sunned cover edges & cover edge creases. About 9-1/2 x 6-1/2 with 21 pages. Scarce!