Photograph of a group of unidentified people on horseback, stopped on a steep slope in a forested area. In the distance, two people are walking up the slope toward the riders. A mountain is faintly visible in the background at right.

Photograph showing part of a body of water and unidentified mountains in the distance. The text “A-15” is written on the negative and is visible at the bottom of the photograph.

Photograph showing part of a body of water and unidentified mountains in the distance. The text “A-18” is written on the negative and is visible at the bottom of the photograph.

Photograph showing an unidentified man with a dog sitting on the edge of a rocky outcropping overlooking a valley, mountains, and a body of water. Image note: Photograph shows discoloration due to deterioration of the negative.

Photograph showing an unidentified man and girl with two dogs standing on the riverbank on the Oregon side of the Columbia River Gorge. Across the river are Beacon Rock, at left, and Hamilton Mountain, at center. Image note: Light leak on negative.

Negative of a photographic postcard showing the Vista House at Crown Point in the Columbia River Gorge. Looking northeast, with a view of the Washington Cascades and the Columbia River. Handwriting on negative reads, "Crown Point - Vista House - Columbia River, Ore. Christian 11-702." There are scratches near the top of the negative.

Negative of a photographic postcard showing the Vista House at Crown Point in the Columbia River Gorge. View looking east at the Vista House, with the gorge and the Columbia River in the background. Handwriting on negative reads, "Crown Point. Columbia River - Ore. Christian 11-759."

Negative of a photographic postcard showing a view in the Columbia River Gorge. Taken on the Oregon side of the Columbia River Gorge, and looking north across the Columbia River toward mountains in Washington. A portion of the Historic Columbia River Highway is in the left foreground, and a large, windswept tree stands prominently left of center. Handwriting on negative reads, "Columbia River - Silver Star Mountain. Christian 11-777."

Negative of a photographic postcard showing a portion of the Columbia River Highway near Biggs, Oregon. The highway is at the base of a mountain with several cliffs. The Columbia River is on the right. Handwriting on negative reads, "Columbia Riv. Hwy. near Biggs, Ore. Christian 11-916."

Negative of a photographic postcard showing a view of a mountain across the Columbia River in the Columbia River Gorge. Taken from the Oregon side and looking towards the mountain in Washington state. Handwriting on negative reads, "Flattop Mountain - Columbia River. Christian 11-666."

Negative of a photographic postcard showing a view of the east end of the Columbia River Gorge. Taken from a hill on the Oregon side of the gorge, looking across the Columbia River toward Washington. Parts of a town, possibly The Dalles, are visible through the trees at the base of the hill. Handwriting on negative reads, "View from The Dalles Scenic Drive. Christian 11-929."

Photograph looking downhill, showing two linemen at the top of a utility pole with Mt. Jefferson visible in the distance. Snow can be seen on the ground, trees, and mountains throughout the frame. A utility pole and electric line are at the right side of the frame. Likely taken near Timberline Lodge. Written on the negative is "57-320." (Image note: see related image PGE 57-320-15).

Hand-written caption. Signed by Watkins.

Hand-written caption. Signed by Watkins.

Stereograph of view looking east at Mitchell Point on the Oregon side of the Columbia River Gorge, circa 1882.

Stereograph of view looking east at Mitchell Point on the Oregon side of the Columbia River Gorge, circa 1882.

Stereograph originally taken by Alfred A. Hart circa 1862-1869 and reprinted by Carleton Watkins, who acquired Hart's negatives in 1869. Hart was the official photographer for the Central Pacific Railroad.

Stereograph originally taken by Alfred A. Hart circa 1862-1869 and reprinted by Carleton Watkins, who acquired Hart's negatives in 1869. Hart was the official photographer for the Central Pacific Railroad.

Stereograph originally taken by Alfred A. Hart circa 1862-1869 and reprinted by Carleton Watkins, who acquired Hart's negatives in 1869. Hart was the official photographer for the Central Pacific Railroad.

Stereograph originally taken by Alfred A. Hart circa 1862-1869 and reprinted by Carleton Watkins, who acquired Hart's negatives in 1869. Hart was the official photographer for the Central Pacific Railroad.

Boudoir card of Mt. Hood photographed from The Dalles. The Columbia River is in the foreground. Photograph is inscribed incorrectly with the date "1867."

Boudoir card of Mt. Hood photographed from The Dalles. The Columbia River is in the foreground. Photograph is inscribed incorrectly with the date "1867."

Carte de visite of Mount Shasta, with a wooden fence in the foreground. There is a visible crease from the top to the bottom of the image. Not positively identified as having been taken by Carleton E. Watkins. Title written on verso of photograph in unknown hand.

Carte de visite of Mount Shasta, with a wooden fence in the foreground. There is a visible crease from the top to the bottom of the image. Not positively identified as having been taken by Carleton E. Watkins. Title written on verso of photograph in unknown hand.