404. That’s an error.

The requested URL /bookmarks/mark?op=edit&bkmk=http%3A%2F%2Fdata.bnf.fr%2Ffr%2F11757164%2Fassociation_internationale_de_geodesie_conference_generale%2F&title=Association+internationale+de+g%C3%A9od%C3%A9sie.+Conf%C3%A9rence+g%C3%A9n%C3%A9rale+%2804+%3B+1874+%3B+Dresde%2C+Allemagne%29 was not found on this server. That’s all we know.