The basis of Samuel Clemens dialogue in the recent episode of Star Trek appears to be "Was the World Made for Man?" which may be found in WHAT IS MAN? AND OTHER PHILOSOPHICAL WRITINGS, UCal Press, 1973, pgs. 101-106 written in 1903. It includes the references to Alfred Russel Wallace and the discussion of the oyster that the Clemens character asserted in the program. I was wondering what year they were attempting to set the story in. Those interested in science fiction and Mark Twain might also find two books of interest. Kirk Mitchell's NEVER THE TWAIN is also set in San Francisco and involves time travel. It is a thoroughly enjoyable and well-written book. David Carkeet's I BEEN THERE BEFORE about Clemen's return with Halley's Comet in 1985 is a tour de force that pokes fun at all the sacred establishments of Twain scholarship. It will be interesting to see how the Star Trek writers resolve the season-ending cliff hanger that ended in a puff of smoke from SLC's cigar. K.B.