TWAIN LIST:
  Sorry -- my goof!  I forgot to click the earlier send to "Plain Text", so if you got a lot of screwy-looking text with zeros and multiple letter A inserts, that's why. 

Richard R.

Here is my message again, in Plain English: (with a few added words)
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California/Oregon/Nevada book sources: For Rick Talbot and all: 

A0 Both Paul Fatout's books, "Mark Twain Speaks for Himself" (1978), "Mark Twain Speaking"  (1976) are available in Oakland & San Francisco libraries. If your local LA library doesn't have them, they're available from a number of libraries in CA and NV through the wonderfully useful (AND FREE) libraries' linkup called LINK+ - ask your librarian if the LA system is linked. 

From SF Public: 
  "Mark Twain speaking"  edited by Paul Fatout. Publication Info. Iowa City : University of Iowa Press, c1976.  (Additional information is currently unavailable) 
Summary "Mark Twain Speaks for Himself '   by Fatout, Paul (Editor); Twain, Mark (Purdue U Press, pub. 1978):
 "Where does the Twain meet? As observer and reporter. As teacher and preacher. With a twinkle in his eye. With whimsy in his heart. 
 "Twain indeed speaks volumes for himself through his newspaper stories, humorous columns, letters, speeches, and interviews, gathered together here for the first time in one paperback volume and providing a picture of the consummate writer, unabashed, critical, and cutting. A perfect title for every Twain collection." 

Contents
Neither the SF nor Oakland library lists the included writings in either book on their web page, but the speech could be in both.  
NEWER EDITION: Powells Books, the Pacific states' best bookstore/source has a "Mark Twain Speaks for Himself" 1997 printing to sell you for $13.25, but are out - you can backorder it. 
They list a rare copy of "Mark Twain Speaking", but 'tain't cheap : $87.75. Also on backorder.

 If you call them, they'll likely be able to tell you how soon they'll mail either book down from Portland. (find a store | 800-878-7323 | web www.Powells.com ) 
They'll also tell you if the preferred item is in both books, and if they'll be getting a MT Speaking edition at a reasonable price.

. NOTES:   My friends in Poland told me there was a well-known rebel writer there who published (in CP Martial Law days!) a pamphlet: "The Onanist Manifesto", and it got past the censors. Sold like hot kielbasa, they said. We couldn't locate a copy in Polish or English.  
Related issue: My UC San Francisco urology doctors, m.&f., have confirmed the decades-old rumor that a positive early prostate problem prevention method is "Frequent ejaculation - with or without a partner." (direct quote) A well-kept medical secret, they admit, but good physician humor. Did Dr. Joycelyn Elders know this? Did she tell Bill?
My Lodz U American Studies students got a kick out of his firing her for her leaked advice to naughty boys and  men.

Richard R. - Docking by SF Bay.