Papers include correspondence, notes, court records, financial records, and newspaper articles. Topics include ranching and business interests, family members, legal cases, investments, oil development in northeastern Wyoming (particularly the Kaycee dome), and Wyoming politics featuring information on Joseph Carey, Lester Hunt, John Kendrick, Joseph O'Mahoney, Nellie Tayloe Ross, William Ross, Harry Schwartz, and Nels Smith.

Justice Blume's records deal with family life, personal finances, individual court cases, and state and national legal, political and social issues. Correspondents include family members, lawyers, and state and national political leaders. Blume reflected on many political issues of the day. His notes and notebooks provide insight into his legal and intellectual interests. In particular, he studied, lectured and wrote on various aspects of the Roman legal system.