This collection consists of the pre-1934 institutional archive of the William Andrews Clark Memorial Library and the records of its founder, William Andrews Clark, Jr. Items include correspondence, invoices, photographs, secondary source materials and other documents related to Clark, his library, and his family, friends and colleagues.

Diverse materials documenting the lives of several different members of the McManus family, including Alice G. McManus Clark, including clothing, textiles, photographs, newspaper clippings, and other papers, all originally stored in a large wooden steamer trunk originally owned by Margaret McManus.