Negative of a photographic postcard showing a lake and the Three Sisters mountains in the Cascade Range. The mountains are reflected in the water of the lake. The landscape is snowy. Handwriting on negative reads, "Winter Reflections - Three Sisters, Ore. Christian S-357."

Negative of a photographic postcard showing snowy mountains in the Oregon Cascade Range. Pictured (left to right) are the Three Sisters, Mount Washington, and Three Fingered Jack. Handwriting on negative reads, "Three Sisters, Mt. Washington, Three Finger Jack - Oregon. Christian S-353."

Negative of a photographic postcard showing South Sister mountain in the Oregon Cascade Range. The peak of the mountain is obscured by clouds. Taken from a meadow near the peak. Handwriting on negative reads, "South Sister of the Three Sisters - Ore. Christian S-383."

Negative of a photographic postcard showing a river in the foreground and a view of South Sister mountain in the background. Handwriting on negative reads, "South Sister from Fall Creek, Oregon. Christian S-184."

Negative of a photographic postcard showing a cracked patch of ice and snow along the summit ridge of a mountain. The mountain peak is in the background. Handwriting on negative reads, "Snow Fields - Three Sisters - Oregon. Christian S-371."

Negative of a photographic postcard showing a view of Scott Lake and the Three Sisters mountains in the background. Handwriting on negative reads, "Scott Lake McKenzie Highway, Oregon. Christian S-264."

Negative of a photographic postcard showing a highway in the high desert of Central Oregon. There is a view of the Three Sisters mountains in the Cascade Range in the distance. Handwriting on negative reads, "Redmond - Sisters Highway - Oregon. Christian S-243."

Negative of a photographic postcard showing a person sitting on a rock, looking at a view of North and Middle Sisters in the distance. Both mountains have snow on them. The person's back is to the camera. There are large rocks in the foreground. Handwriting on negative reads, "North and Middle Sisters - Oregon. Christian S-135." Handwriting also notes elevation of North Sister as, "el. 10094" and elevation of Middle Sister as, "el. 10053."

Negative of a photographic postcard showing a view of Middle Sister and North Sister mountains from McKenzie Pass in the Cascade Range in Oregon. The view is from behind a rock wall, tinted blue, in the foreground. The mountains are covered in snow. Handwriting on negative reads, "McKenzie Pass, Oregon. Christian S-242."

Negative of a photographic postcard showing a view of the Cascade Range mountains from Lava Butte Road in Oregon. View includes Mount Bachelor, Broken Top, and the Three Sisters mountains. Handwriting on negative reads, "Lava Butte Road - Oregon. Christian S-285."

Negative of a photographic postcard showing a person standing on a large lava bed in the McKenzie Pass area of the Cascade Range in Oregon. The lava bed is surrounded by a forest. Middle Sister and North Sister mountains are in the background. Handwriting on negative reads, "Lava Beds - McKenzie Pass, Oregon." The sky in the photograph has been colored blue.

Negative of a photographic postcard showing a glacier on a mountain. A mountain peak is visible in the background. Handwriting on negative reads, "Glacier between Middle and North Sisters, Ore. Christian S-389."

Negative of a photographic postcard showing Elk Lake with a view of South Sister in the background. Taken from the shore of the lake. Broken Top mountain is visible to the right. Handwriting on negative reads, "Elk Lake near Bend, Oregon. Christian S-254."

Negative of a photographic postcard showing a person looking through a telescope at the D. Wright Observatory on the McKenzie Pass in the Cascade Range in Oregon. Lava beds and trees stretch into the distance and Middle Sister and North Sister mountains are in the background. There is a directional marker in the foreground. Handwriting on negative reads, "D. Wright Observatory - McKenzie Pass, Ore. View from Observatory. Christian S-160A."

Negative of a photographic postcard showing a road on the McKenzie Pass in the Cascade Range in Oregon. Middle Sister and North Sister mountains are in the background. Handwriting on negative reads, "Along McKenzie Pass, Oreg. Christian S-161."