404. That’s an error.

The requested URL /bookmarks/mark?op=edit&bkmk=https%3A%2F%2Fdata.bnf.fr%2Fde%2F12229336%2Fpierre_chevalier%2F&title=Pierre+Chevalier+%281571%3F-16..%29 was not found on this server. That’s all we know.