The papers of Seth Thomas consist of 292 items dating from 1904 through 1962. Judge Thomas' life and career are documented in this collection, from a genealogy of the Thomas family to memorials for the judge himself. His years spent as an educator are reflected in speeches, correspondence, and material from the Iowa Schoolmasters Walt Whitman Club. His legal and judicial careers are chronicled with speeches, court cases, and correspondence including letters from Henry N. Graven and John B. Sanborn.