Collection includes a manuscript letter written from English Camp, Cultus Lake, Idaho, with ink and color pencil sketches entitled "Pend d'Oreille Country"; an ink and watercolor sketch of Weeksville, Montana; a sketchbook with pencil and ink Pacific Northwest scenes; and an autograph book containing pencil and ink sketch of Tillamook Bay, Oregon.

Sketchbook with watercolors and pencil sketches of Oregon, Mt. St. Helens, Mt. Hood, Michigan, and other places Martha Strong Gebhart traveled.

Twelve scenic art prints of the Standard Oil Company of California's ad campaign "See Your West." Scenes include Mt. Hood, Olympic National Park, the Oregon Coast, Mt. St. Helens, Spirit Lake, South Silver Creek Falls, Multnomah Falls, the Wallowa Mountains, and the McKenzie River.

Collection includes 31 tinted lithographs depicting scenes of the Pacific Northwest done for the U. S. Pacific Railroad Exploration and Survey Report. Scenes include the Columbia River, waterfalls, Nimiipuu (Nez Percé) people, the Palouse River, Hudson's Bay Company, the Cascades, Mount Rainier, lakes, and missions.

Color lithograph of the Cascade Mountains done for the U. S. Pacific Railroad Exploration and Survey Report.

Collection includes five tinted lithographs of scenes of the Pacific Northwest done for the U.S. Pacific Railroad Exploration and Survey Report, 1855. Scenes include a Douglas fir, Mount Hood, Mount Jefferson, and the Three Sisters.