This set of materials is broken down into archival sources and correspondence. The archival sources document the years of research necessary to bring this exhibition together and include photocopies and research from a number prominent archives, both local and international.The correspondence documents active research dialogues that took place between Innis Shoemaker and a number of scholars, gallery owners, and family members willing to share their knowledge and memories of Earl Horter.
Sub-subseries 2. Archives
Prints, Drawings, and Photographs Department Records / I. Exhibition records / M. "Mad for Modernism: Earl Horter and His Collection." Mar. 7-May 16, 1999 / 7. Multimedia and oversized materials / f. Archives. Archival sources. Philadelphia City Hall Office of Old Records. Arrangement
Archival sources are arranged alphabetically by subject, and correspondence is grouped into three categories: scholars and modernists; galleries and dealers, and family.