Walter A. Mason of Oakland, Ill., was active in Illinois politics and served as the Coles County Senatorial Campaign Committeeman for the 40th Senatorial District between 1898 and 1900. This collection focuses on the state senatorial campaign of 1900, mainly the reelection of Stanton C. Pemberton, and includes correspondence, newspaper clippings, and a scrapbook on Pemberton's reelection. The correspondents include Mason, Pemberton, Gov. Len Small, and Sen. Shelby Cullom, while the clippings concern Mason, Pemberton, Gov. John R. Tanner, and various political issues.
The collection was donated to the Library by Matthew W. Glenn, Jr.