The best on-line source was at Archive.org (searching using 'Gazette Nationale ou Le Moniteur Universel), yet it only has issues from 1794 through 1804::
https://archive.org/search.php?query=Gazette%20nationale%20ou%20Le%20moniteur%20universel%20AND%20mediatype%3Atexts
Русская версия Invision Power Board (http://www.ws.ea7.net)
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