"4419 -- Palace of Natural History, San Diego Exposition, California. This huge building houses 397,088 specimens of mounted birds, birds eggs, fishes, fossils, invertebrates and vertebrates, insects, mannals, marine invertebrates, minerals, plants, reptiles, shells and an extensive scientific reference library. Included are the only dinosaur and mosasaur skeletons on the Pacific coast. This collection forms one of the finest in the West." Postmarked August 31, 1938.