As far as I know, _Huck Finn & Tom Sawyer Among the Indians_ was first
published in _Life_ in the December 20, 1968, issue.  The story begins on
page
32.  The cover of the issue has a picture of Twain at 55, painted by Charles
Noel Flagg, and the cover announces, "An unpublished manuscript by MARK
TWAIN."

Rich Tuerk