Stereograph of the west entrance to the Oregon Railway & Navigation Co.'s Tunnel No. 3 on the Oregon side of the Columbia River Gorge, circa 1882. Items 2/85 and 2/86 are duplicate stereographs on different mounts. Alternate caption on stereograph 2/86: "Tunnel No. 3, West Portal, Columbia River Scenery, Oregon."

Stereograph of the interior of Oregon Railway & Navigation Co.'s Tunnel No. 3 on the Oregon side of the Columbia River Gorge, 1883. Items 2/88 and 2/89 are duplicate stereographs on different mounts. Alternate caption on stereograph 2/88: "Interior Tunnel No. 3, Oregon."

Stereograph of the Oregon Railway & Navigation Co.'s railroad tracks and railroad car, east of The Dalles, Oregon on the Columbia River Gorge, circa 1882. The white cart on the platform behind the railroad car contains Carleton Watkins's photographic supplies.

Stereograph of Oregon Railway & Navigation Co. railroad tracks east of Oneonta Bluffs, Columbia River Gorge, Oregon, 1883. Items 2/72 and 2/73 are duplicate stereographs on different mounts. Alternate caption on stereograph in 2/72: "Oneonta Bluffs, Columbia River Scenery, Oregon."

Stereograph of the Oregon Railway & Navigation Co.'s railroad bridge over Hood River, circa 1883. Items 2/82 and 2/83 are duplicate stereographs on different mounts. Alternate caption on stereograph 2/83: "Hood River Crossing, Oregon."

Stereograph of the interior of Oregon Railway & Navigation Co.'s Tunnel No. 3 on the Oregon side of the Columbia River Gorge, 1883. Items 2/88 and 2/89 are duplicate stereographs on different mounts. Alternate caption on stereograph 2/89: "Interior Tunnel No. 3, Columbia River Scenery, O'gn."

Stereograph of the interior of Oregon Railway & Navigation Co.'s Tunnel No. 3 on the Oregon side of the Columbia River Gorge, 1883. Items 2/88 and 2/89 are duplicate stereographs on different mounts. Alternate caption on stereograph 2/89: "Interior Tunnel No. 3, Columbia River Scenery, O'gn."

Stereograph of the interior of Oregon Railway & Navigation Co.'s Tunnel No. 3 on the Oregon side of the Columbia River Gorge, 1883. Items 2/88 and 2/89 are duplicate stereographs on different mounts. Alternate caption on stereograph 2/88: "Interior Tunnel No. 3, Oregon."

Stereograph of view looking east down the Columbia River Gorge from the bluff over the Oregon Railway & Navigation Co.'s Tunnel No. 3, circa 1882. Items 2/90 and 2/91 are duplicate stereographs on different mounts. Alternate caption on stereograph 2/91: "Rock Bluff from over Tunnel No. 3, Col. River Scenery, Oregon."

Stereograph of the Oregon Railway & Navigation Co.'s railroad tracks and railroad car, east of The Dalles, Oregon on the Columbia River Gorge, circa 1882. The white cart on the platform behind the railroad car contains Carleton Watkins's photographic supplies.

View down the Columbia River, with the foot of Mitchell's Point in the foreground. A railroad track goes around the foot of Mitchell's Point. Loose duplicate plate in 5/5. This plate is part of Carlton Watkin's "Sun Sketches of Columbia River Scenery" album.

View of a railroad track emerging from Tunnel No. 3 just above the Columbia River. This plate is part of Carlton Watkin's "Sun Sketches of Columbia River Scenery" album.

View up the Columbia River, taken from over Tunnel No. 3. Railroad tracks run along the base of a rock bluff on the river. This plate is part of Carlton Watkin's "Sun Sketches of Columbia River Scenery" album.

View of Castle Rock, also known as Beacon Rock, on the Washington side of the Columbia River Gorge. Photo taken from up river on the Oregon side of the gorge. Railroad tracks in the foreground.

Stereograph of a distant view of Castle Rock, also known as Beacon Rock, taken from the Oregon Railway & Navigation Co's railroad tracks east of Castle Rock, 1883.

Boudoir card of the Oregon Railway and Navigation Company's railroad tracks passing through The Needles rock formation, Columbia River Gorge.

View of the Tooth Bridge, part of the Oregon Steam Navigation Co.'s Oregon Portage Railroad in the Columbia River Gorge. The Cascade Mountains rise in the background. This plate is part of Carlton Watkin's "Sun Sketches of Columbia River Scenery" album.

View of the Tooth Bridge, part of the Oregon Steam Navigation Co.'s Oregon Portage Railroad in the Columbia River Gorge. The bridge crosses Eagle Creek in the distance. The calm waters of the Columbia River Channel reflect surrounding trees. Loose duplicate plate in 5/2. This plate is part of Carlton Watkin's "Sun Sketches of Columbia River Scenery" album.

Railroad tracks just outside Oneonta Gorge. Photograph taken from the mouth of the Oneonta Gorge. Loose duplicate plate in 5/3. This plate is part of Carlton Watkin's "Sun Sketches of Columbia River Scenery" album.

View of a railroad track crossing a lake in the Columbia River Gorge. Loose duplicate plate in 5/4. This plate is part of Carlton Watkin's "Sun Sketches of Columbia River Scenery" album.

Stereograph of the Oregon Railway & Navigation Co.'s railroad bridge over Hood River, circa 1883. Items 2/82 and 2/83 are duplicate stereographs on different mounts. Alternate caption on stereograph 2/82: "Hood River Crossing, Columbia River Scenery, Oregon."

Stereograph of the west entrance to the Oregon Railway & Navigation Co.'s Tunnel No. 3 on the Oregon side of the Columbia River Gorge, circa 1882. Items 2/85 and 2/86 are duplicate stereographs on different mounts. Alternate caption on stereograph 2/85: "West Portal, Tunnel No. 3, Oregon."

Stereograph of the west entrance to the Oregon Railway & Navigation Co.'s Tunnel No. 3 on the Oregon side of the Columbia River Gorge, circa 1882. Items 2/85 and 2/86 are duplicate stereographs on different mounts. Alternate caption on stereograph 2/85: "West Portal, Tunnel No. 3, Oregon."

Stereograph of the Oregon Railway & Navigation Co.'s Tunnel No. 3 on the Oregon side of the Columbia River Gorge, 1883

Stereograph of the Oregon Railway & Navigation Co.'s Tunnel No. 3 on the Oregon side of the Columbia River Gorge, 1883

Stereograph of view looking east down the Columbia River Gorge from the bluff over the Oregon Railway & Navigation Co.'s Tunnel No. 3, circa 1882. Items 2/90 and 2/91 are duplicate stereographs on different mounts. Alternate caption on stereograph 2/90: "Rock Bluff, from over Tunnel No. 3, Oregon."

Stereograph of the Oregon Railway & Navigation Co.'s railroad tracks between The Dalles, Oregon and Celilo, just east of Five Mile rapids, circa 1882.

Stereograph of the Oregon Railway & Navigation Co.'s railroad tracks between The Dalles, Oregon and Celilo, just east of Five Mile rapids, circa 1882.