Hi,

 Don't forget to check out "The Whittier Birthday Speech"--wherein Mark
Twain infuses a euchre game with quotes from some of the best American
poets, who were there at the banquet to honor John Greenleaf Whittier.


http://etext.virginia.edu/railton/onstage/whittier.html
and if you haven't seen it already, here's an entire web page committed
to Mark Twain and poker:


http://www.holdempools.com/poker-literature-mark-twain-1835-1910.html


Good luck with your article!

Richar Henzel