This web edition is derived from the plain text edition available from Project Gutenberg, which one presumes is taken from the first American edition, although provenance is not stated. A quick scan suggests that it is from the 1922 edition.
Rendered into HTML on Saturday May 24 14:50:14 CST 2003, by Steve Thomas for The University of Adelaide Library Electronic Texts Collection.
For offline reading, the complete set of pages is available for download from http://etext.library.adelaide.edu.au/j/j8u/j8u.zip
The complete work is also available as a single file, at http://etext.library.adelaide.edu.au/j/j8u/j8u.html