Byron Hoyt, a wonderful sheet music store in San Francisco, has put together a Historic American Sheet Music Collection that you can view online. The collection consists of 3.000 pieces of sheet music, published between 1850 and 1920. Each is completely scanned, from cover to back. There are patriotic war songs, pleas for secession, tunes that fight for women’s rights, waltzes, polkas, and many a love song.