Those Gottschalk Polkas -- are they early Rag style or not?  If you
want to listen to them and decide, they are:-

  Polka in A flat RO275
  Polka in B flat RO273

They are on Hyperion CDA66697, "Gottschalk Piano Music Disk 2" played
by Philip Martin, and Amon Ra (Saydisc) CD-Sar 32, "Gottschalk Piano
Music on Original Pianos", played by Richard Burnett.  The pianos used
are in the Richard Burnett Collection, Finchcocks, Goudhurst, Kent.

Ian McDonald