I got this site in email from a cousin. I have not had time yet to check it out, but sounds interesting. "National Union Catalog of Manuscript Collections," also known as NUCMC, at: http://lcweb.loc.gov/coll/nucmc/nucmc.html What is NUCMC? The National Union Catalog of Manuscript Collections (NUCMC) is a free-of- charge cooperative cataloging program operated by the Library of Congress. How does the program work? On the basis of cataloging data supplied by eligible repositories to the NUCMC program, NUCMC catalogers create MARC (Machine Readable Cataloging) bibliographic records in RLIN (Research Libraries Information Network), a national-level database, describing collections held by participants, and establish pertinent name and subject authority headings. Descriptions and locations of the material are then available to researchers on RLIN throughout the United States and around the world. IMPORTANT: the original documents (letters, diaries, photographs, maps, etc.), are NOT online at NUMCMC--just a detailed, written descriptions. What we in the library biz call catalog or bibliographic records. To get copies of original documents, you must contact the institution that owns them.