See also the 2021 second edition in PDF [8MB] and Word formats, prepared by Mike Thomas (2023).
Documents posted between 2003-2012 had various slightly different URLs and sometimes can be found in archive.org with addresses like bahai-library.org/file.php5?file=shoghi-effendi_messages_antipodes.
Documents posted prior to October 2003 were at bahai-library.org [archive.org] and had completely different URLs.