Was Twain just being his unpredictable self when he published "Extract  
from Captain Stormfield's Visit to Heaven"?
Was there ever a "complete" work published?

In any case, I've just completed a new recording of the work for  
Librivox. org and Archive.org.

They're at:

http://librivox.org/extract-from-captain-stormfields-visit-to-heaven-by-mark-twain-2/

and

http://www.archive.org/details/captain_stormfield_1105_librivox