The Levi Walter Syphus Papers date from 1889 to 1930 and document the activities of Levi Walter Syphus (1866-1949), a southern Nevada pioneer and state legislator. The collection contains a financial ledger, meeting minutes of the Board of Control of the Lincoln County Experiment Farm, and records of experiments in refining magnesite.

The Lewis Homes Records (approximately 1990-2009) contain the records of Lewis Homes, a Southern California based company that was one of the top home builders in the Las Vegas Valley during the 1990s and 2000s. This collection focuses on the Orchards and Orchards West neighboorhood in eastern Las Vegas, Nevada and contains a parcel map, history of title claims for certain land parcels, and documents related to site development. The collection also contains some material related to the Southern Nevada Homebuilders Association in the 2000s.