Some examples
American Verse Project (http://www.hti.umich.edu/a/amverse/)
American Fiction Collection (http://etext.lib.virginia.edu/eaf/pubindex.html)
Walt Whitman Archive (http://www.whitmanarchive.org/)
Newton Papers
(http://www.newtonproject.ic.ac.uk/)
Sample transcription
Women's Travel Writing, 1830-1930 (http://etrc.lib.umn.edu/womtrav.htm)
Women Writers Project (http://www.wwp.brown.edu/)