View of the Upper Block House, also known as Fort Lugenbeel, on the Columbia River in the Columbia River Gorge. Other buildings and a railroad bridge are also visible. OHS Collection includes 2 duplicates of this mammoth plate on different mounts. One duplicate bears Watkins' signature on the back and has the alternate title, "Upper Blockhouse, Cascades."

View of islands in the Columbia River in the Columbia River Gorge.

View of the Cascade Rapids on the Columbia River, taken from the Oregon side of the Columbia River Gorge. Upper Block House, also known as Fort Lugenbeel, is visible in the background on the left.

View down the Columbia River from the Middle Landing of the Oregon Portage Railroad on the Oregon side of the Columbia River Gorge. The outline of Castle Rock, also known as Beacon Rock, is visible in the distance.

View of the Columbia River, taken near the head of Bradford's Island. Tree branch in the foreground. OHS Collection includes 1 duplicate of this mammoth plate, on a different mount, with the alternate title, "View Down the Columbia. Head of Bradfords Island. Cascades."

View of Mt. Hood rising over the Columbia River. Taken from northeast of The Dalles.

View of the Passage of the Dalles on the Columbia River. Taken near the head of the Dalles, northeast of the city of The Dalles.

View of rapids on the Columbia River in the Columbia River Gorge, looking east up the river. Railroad tracks in the foreground.

View of a distant Mount Hood, rising over the Columbia River. In the foreground, long fences encircle a property and a log cabin. Taken from the south side of Government Island. Loose, cropped duplicate plate in 5/1. Condition note: Exposure has faded and Mount Hood is barely visible. This plate is part of Carlton Watkin's "Sun Sketches of Columbia River Scenery" album.

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.

A fishwheel floats on the Columbia River in the Columbia River Gorge. A man stands on the attached vessel. Loose duplicate plate in 5/3. This plate is part of Carlton Watkin's "Sun Sketches of Columbia River Scenery" album.

View of Cape Horn on the Washington side of the Columbia River Gorge, looking up the Columbia River. Loose, cropped duplicate plate in 5/1. This plate is part of Carlton Watkin's "Sun Sketches of Columbia River Scenery" album.

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 Cape Horn on the Washington side of the Columbia River Gorge, looking down the Columbia River. There is a fence and large tree stump in the foreground. Loose duplicate plate in 5/1. This plate is part of Carlton Watkin's "Sun Sketches of Columbia River Scenery" album.

View of the Columbia River and cliffs in the Columbia River Gorge. Loose duplicate plate in 5/6. 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 looking up the Columbia River, taken from a rock bluff. There is a boat on the river. This plate is part of Carlton Watkin's "Sun Sketches of Columbia River Scenery" album.

View of Mount Hood and the Columbia River taken from the head of the Dalles. Loose duplicate plate in 5/7. 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 the Oregon side of the Columbia River Gorge. There are 2 structures, possibly houses, on the shore of the Columbia River. This plate is part of Carlton Watkin's "Sun Sketches of Columbia River Scenery" album.

View of Mount Hood and the Columbia River taken from the head of the Dalles. Condition note: Exposure has faded and Mount Hood is barely visible. This plate is part of Carlton Watkin's "Sun Sketches of Columbia River Scenery" album.

View of Mount Hood and the head of the Dalles on the Columbia River. Railroad tracks run alongside the river and then cross it in the distance. Loose duplicate plate in 7/1. Condition note: Exposure has faded and Mount Hood is not visible. This plate is part of Carlton Watkin's "Sun Sketches of Columbia River Scenery" album.

View of the Columbia River at the passage of the Dalles. Loose duplicate plate in 7/1. This plate is part of Carlton Watkin's "Sun Sketches of Columbia River Scenery" album.

View looking up the Columbia River from the passage of the Dalles. A Native American village can be seen in the distance, on a bluff above the river. Loose duplicate plate in 7/1. This plate is part of Carlton Watkin's "Sun Sketches of Columbia River Scenery" album.

A large rock formation marks the head of the Dalles on the Columbia River. People stand on the bank of the river. Loose duplicate plate in 7/1. This plate is part of Carlton Watkin's "Sun Sketches of Columbia River Scenery" album.

View of the Cascades rapids of the Columbia River, showing construction of the downstream end of the Cascade Locks, circa 1882-1883. This plate is part of Carlton Watkin's "Sun Sketches of Columbia River Scenery" album.

The Cascades rapids of the Columbia River. The blockhouse at Fort Cascades is in the background. Loose duplicate plate in 7/1. 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 Cascade Mountains rise in the background. This plate is part of Carlton Watkin's "Sun Sketches of Columbia River Scenery" album.