Though published by an NSA, this document has been classified as "Compilation_personal" because it did not originate from the Baha'i World Center.
Documents posted between 2003-2012 had slightly different URLs and can be found in archive.org with addresses like bahai-library.com/?file=compilation_suffering_bahaullah.
Documents posted prior to October 2003 were at bahai-library.org [archive.org] and had completely different URLs.