Correspondence, diary, notes for speeches, documents, photographs, and other papers of Hiller and his wife Liuboff Gouberoff Hiller, relating to his career as a whaler out of New Bedford, Massachusetts; his work in Siberia as a commercial agent for Boston importers William H. Boardman & Company; as U.S. consul during the Lincoln administration; his specialization in the jewelry trade in New York, and his association with Tiffany & Company.