Thanks to you all for the prompt and helpful responses.  Bob
 
 
In a message dated 9/19/2013 7:50:13 P.M. Pacific Daylight Time,  
[log in to unmask] writes:

There is  info on Clemens's association with John Ross Browne in
several volumes of  MARK TWAIN'S LETTERS (University of California
Press).  This same info  is also available in the online letters
database  at:

http://www.marktwainproject.org

To bring them up in the  letters database, search on:

J. Ross Browne
John Ross Browne
Ross  Browne

Clemens did comment in a letter to his relatives about Browne's  Washoe
writings in Harper's.  And he did stay overnight with Browne  when
Clemens passed through Oakland on a lecture tour in 1866.  The  notes
to these letters make clear that Browne and others believed  YUSEF
influenced Twain's  writing.

Barb