404. That’s an error.

The requested URL /bookmarks/mark?op=edit&bkmk=https%3A%2F%2Fdata.bnf.fr%2Ftemp-work%2F372de035bf1d619d72cd03ee7254913f%2F&title=Les+t%C3%A9n%C3%A8bres+dissip%C3%A9es was not found on this server. That’s all we know.