The WTC actively seeks manuscript and photographic materials and encourages its friends to contact the Collection about the possibility of archiving personal papers and business records. These include letters, memoirs, diaries, photo albums, professional papers, genealogical information, speeches, legal documents, brochures, photographs, film/video, and audio tapes. Since its inception, the WTC has depended upon its friends to help it find important research materials and to help preserve the historical memory.