The following is an excerpt of the article at www.iranica.com/articles/bab-door-gate-entrance.
Documents posted between 2003-2012 had slightly different URLs and can be found in archive.org with addresses like bahai-library.com/?file=maceoin_iranica_bab.
Documents posted prior to October 2003 were at bahai-library.org [archive.org] and had completely different URLs.