The Mill at Anselma, built in Chester Springs, Pennsylvania in 1747, is the most intact, authentic example of a custom water-powered grain mill in the United States. The Mill at Anselma Preservation and Educational Trust was established in 1998 to "create an innovative historical attraction at the Mill at Anselma that demonstrates through sensory experiences, the evolution of technology and the impact of change in commerce, free enterprise, and transportation on American life over three centuries for schoolchildren, families, scholars, visitors and local residents." The Trust houses approximately 10 linear feet of archival materials dating from 1844 to the present, including a collection of primary and secondary-source materials, such as ledgers, oral histories, photographs, blueprints of the mill and surrounding property, newspaper clippings, and subject files relating to the history of the mill and the families that ran it, and the office files of Eleanor Morris, the co-founder and former president of the French and Pickering Creeks Conservation Trust and a founding member of the Mill at Anselma Preservation and Educational Trust.