Negative of a photographic postcard showing the Caveman Bridge over the Rogue River in Grants Pass, Oregon. Taken from the shore of the river. Handwriting on negative reads, "Bridge over Rogue River, Grants Pass, Ore. Perkins P-1421."

Negative of a photographic postcard showing the Hellgate Bridge over the Rogue River in Oregon. Taken from the shore of the river. Handwriting on negative reads, "Hells Gate Bridge - Rogue River, Ore. Christian P-268."

Negative of a photographic postcard showing stalagmites and stalactites in a cave at the Oregon Caves National Monument in Oregon. This area of the cave is known as the "Petrified Forest." Handwriting on negative reads, "Petrified Forest Oregon Caves, Oregon. Christian S-410A." This phrase is written twice on the negative.

Negative of a photographic postcard showing 2 women walking on a path inside a cave at the Oregon Caves National Monument in Oregon. Handwriting on negative reads, "Oregon Caves. Devil's Cradle - River Styx. Christian S-406."