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.

Stereograph of construction materials at the Oregon Railway & Navigation Co.'s Bonneville Station for the building of railroad bridges, circa 1882.

Boudoir card of Castle Rock (also known as Beacon Rock) across the Columbia River on the Washington side of the Columbia River Gorge. Photo taken from Oregon side of the Gorge. There is a railroad in the foreground.

Boudoir card of Castle Rock (also known as Beacon Rock) across the Columbia River on the Washington side of the Columbia River Gorge. Photo taken from Oregon side of the Gorge. There is a railroad in the foreground.

Railroad tracks belonging to the Oregon Steam Navigation Co. at Eagle Creek Crossing in the Columbia River Gorge. Bradford Island is visible across the Columbia River. Loose duplicate plate in Box 5. This plate is part of Carlton Watkin's "Sun Sketches of Columbia River Scenery" album.

Stereograph of an Oregon Steam Navigation Co. employee standing on one of the company’s Vulcan steam engines, the “Betsey Baker,” at the Lower Cascades, Skamania County, Washington Territory, 1867.

Stereograph of the Oregon Steam Navigation Co.’s railroad yard at the Lower Cascades, Skamania County, Washington Territory, 1867.

Stereograph of the Oregon Steam Navigation Co.’s railroad yard at the Lower Cascades, Skamania County, Washington Territory, 1867.

Duplicate of Stereograph 1264, on a different mount. Stereograph of Oregon Steam Navigation Co.’s railroad tracks west of the Middle Block House, also known as Fort Rains, on the Columbia River, Skamania County, Washington Territory, 1867.

Duplicate of Stereograph 1270, on a different mount. Stereograph of Oregon Steam Navigation Co. steam locomotive heading west out of the Upper Cascades, Skamania County, Washington Territory, 1867.

Duplicate of Stereograph 1270, on a different mount. Stereograph of Oregon Steam Navigation Co. steam locomotive heading west out of the Upper Cascades, Skamania County, Washington Territory, 1867.

Stereograph of islands in the Columbia River, south of the Upper Cascades, Skamania County, Washington Territory, 1867.

Duplicate of Stereograph 1272, on a different mount. Stereograph of islands in the Columbia River, south of the Upper Cascades, Skamania County, Washington Territory, 1867.

Duplicate of Stereograph 1295, on a different mount. Stereograph view of the home of Joseph Bailey, superintendent of the Oregon Steam Navigation Co.’s Oregon Portage Railroad and sawmill, at Eagle Creek in the Columbia River Gorge, 1867. The man in the black jacket, hat, and white shirt on the railroad bridge is Joseph Bailey. John Stevenson is sitting on the mule-drawn cart with another unidentified man.

Duplicate of Stereograph 1297, on a different mount. Stereograph depicting The Tooth Bridge and the tracks of the Oregon Portage Railroad, Columbia River Gorge, 1867.

Duplicate of Stereograph 1297, on a different mount. Stereograph depicting The Tooth Bridge and the tracks of the Oregon Portage Railroad, Columbia River Gorge, 1867.

Stereograph of the Tooth Bridge, located west of Eagle Creek in the Columbia River Gorge and part of the Oregon Steam Navigation Co.’s Oregon Portage Railroad around the rapids of the Cascades of the Columbia, 1867. The mule-drawn cart approaching the camera on the tracks is carrying John Stevenson and Joseph Bailey, superintendent of the Oregon Portage Railroad.