I have found the traveling lie quote to fall within that broad category of
"attributed".

I have put a web site up of approximately 600 Twain quotes at:
http://www.tarleton.edu/activities/pages/facultypages/schmidt/barbwww.html

The collection is still undergoing corrections and manual proofreading.
If you spot any errors, please let me know - as it was converted to html
without benefit of spellcheck.

Another Twain web site that popped up this month that should be of significant
interest to Forum members is:

http://etext.virginia.edu/railton/

It contains many scanned pictures of first edition works from the University
of Virginia with a promise of much more to come.  The title of this site is:
_Mark Twain in His Times_.  A lot of hours of work appear to have gone into
this one.

Barb