"Expedition's the word!"

     Clemens uses this once in a letter to Bliss, and once in a letter to
     Riley, but most importantly, twice in a letter to Olivia (11 and 12
     December 1873).  The first two letters may be found in the recently
     published Mark Twain's Letters, Volume 4 1870-1871.

     Can anyone pin this down as an aphorism or a quotation?

     Mark Twain Project
     UC Berkeley
     mtp at UCBLIB_LIBO