Christy's Minstrels Christmas Annual.

[Carl Anderton]

http://books.google.com/books?id=NhwQAQAAMAAJ&dq=banjo%20twang&...

 

Here's an interesting publication by Christy's Minstrels in England, who were a staple for years at St. James Hall in London under G. W. "Pony" Moore.  Frank Converse played with them in 1866 when he undertook his triumphal European tour, which unfortunately was cut short in France because of Hattie's illness.