The answer is both yes and no, but mostly yes.
See the "Background and Publishing History" about the story in
Rasmussen's *Critical
Companion to Mark Twain,* pp. 46*-*47.
On Sun, May 15, 2011 at 10:19 PM, John Greenman <[log in to unmask]> wrote:
> 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
>
--
John H. Davis, Ph.D.
Professor of English
Department of Language and Literature
Chowan University
Murfreesboro, North Carolina 27855