[78-L] Mystery Recording Help..

[78records at cdbpdx.com]

I found a 12" AUDIODISC with some interesting recordings.  Only identifier is a sticky note that says 'Morton-Circle Dubs'.
 
Listen here:
 
http://78records.cdbpdx.com/SALTYDOG_Morton_AUDIODISC_xx.mp3
 
http://78records.cdbpdx.com/PRETTYBABY_Morton_AUDIODISC_yy.mp3
 
I'm really curious to know who/what this is.  Sounds very interesting.  Somebody playing a piano describing working with Bob Johnson in 1913.  
 
Thanks!  CDB