The Floyd Millard Riddick Papers, 1909 to 2000, (bulk 1950-1983), consist of correspondence, writings and speeches, printed material, senate documents, photographs, and organizational papers documenting Riddick's career as the Assistant Parliamentarian, Parliamentarian, and Parliamentarian Emeritus of the United States Senate. The Correspondence Series includes correspondence to and from senators, presidents, and other political figures concerning the rules and procedures of the United States Senate.