Happy Holidays, I copied and pasted this info from another list, as a lot of people who ended up on the Ohio River were from Allegheny Co. This site is AWESOME! Susie The "Historic Pittsburgh Collection" is an online collaboration between the University of Pittsburgh and the Historical Society of Western Pennsylvania. They are making available full-text-searchable books published in the nineteenth and early twentieth centuries. The History of Allegheny County is among those books. So now you can quickly and easily do your own lookup in this wonderful reference book and many others. The goal is to put online "more than 400 items, over 500 archival finding aids, approximately 600 land ownership maps, and access to the Historical Society of Western Pennsylvania's catalog." The website is at http://digital.library.pitt.edu/pittsburgh/ The History of Allegheny County table of contents is located at http://digital.library.pitt.edu/cgi-bin/pitttext-idx.pl?notisid=00afq9167m&type=header This site is amazing - you've got to check it out!