The collection consists of correspondence and ephemera of and relating to M. C. George, who was a lawyer, politician, and judge from Oregon. Notable correspondence includes an 1882 note from Benjamin Alvord that accompanied a map titled, "Rough Sketches from Notes of the Marches by Expeditions in the Summer of 1864," an 1884 letter from Edward R. Geary about Henry Villard and the Northern Pacific Railroad, and a 1905 letter from U.S. Senator Louis E. McComas recommending that George be appointed as a U.S. District Court judge. Other correspondence includes an 1860 letter from J. P. Eckler to Mary Eckler, who would later marry M. C. George; correspondence and related documentation regarding a landslide on George's property; letters from engineer P. W. Marx about a highway extension that would cut through George's orchard in The Dalles; a 1900 letter from C. S. Nickerson about family history; and a 1933 letter from Albert Tozier about Provisional Government Park at Champoeg, Oregon.

Other materials in the collection consist of clippings about George, including obituaries; biographical and family history materials; financial notes; a treatise by an unidentified author about how to remain healthy into old age; and the text of a 1913 speech that George gave to the Columbia and Snake River Waterway Association, titled, "The Commercial Future of Portland and the Great Columbia Basin."