Hi all,  I identified tune 8 on roll 6521 as "Muriel Waltzes" by Joseph
M. Daly.  I got some Wurlitzer PianOrchestra music roll scans, and when
going through them I noticed this one song and knew immediately that
the song labeled "Muriel Waltz" was the same song as the waltz on 6521.

The labeling was not a mistake either as I found the sheet music on
eBay, the first page shown -- the same song:

  http://www.ebay.com/itm/151076659386 

Best Regards,

Mikey Mills

 [ Mikey did a good job using his eyes, ears and his memory!  The music
 [ displayed in the images at eBay matches very closely the music heard
 [ playing in the MP3 audio file offered at the wurlitzer-rolls web
 [ page.  Listen at http://www.wurlitzer-rolls.com/6521-8.mp3 
 [
 [ The name displayed inside the sheet music, above the music on the
 [ title page, is the copyrighted name, "Muriel Waltz", not the name
 [ on the cover.  The cover artist sometimes took liberties with the
 [ copyrighted title, or maybe he was following instructions from the
 [ music publisher who paid him.  Kudos to Mikey Mills!  -- Robbie