404. That’s an error.

The requested URL /bookmarks/mark?op=edit&bkmk=https%3A%2F%2Fdata.bnf.fr%2Fen%2F16713798%2Fjules_cannepin%2F&title=Jules+Cannepin+%2818..-19..%29 was not found on this server. That’s all we know.