- EZRA JACK KEATS: A Virtual Exhibit The de Grummond Collection is the sole repository for the Ezra Jack Keats Archive. Holdings include manuscripts, typescripts, sketches, dummies, illustrations, and proofs for 37 books written and/or illustrated by Ezra Jack Keats. Also included are his personal papers, personal and professional correspondence, fan mail and artwork from children, photographs and ...www.lib.usm.edu/~degrum/keats/main.html