This collection of material by and about L. Frank Baum is an adjunct to the collection of first editions of Baum's writings made by Roland O. Baughman over a period of many years. An important part of the collection consists of the correspondence and papers related to the exhibition of L. Frank Baum. This exhibition was mounted at the Columbia University Libraries in 1956 to mark the centenary of Baum's birth. Baum manuscripts, original drawings by illustrators of Baum books, and issues of periodicals in which Baum pieces appeared constitute the core of the collection.