404. That’s an error.

The requested URL /bookmarks/mark?op=edit&bkmk=https%3A%2F%2Fdata.bnf.fr%2Ffr%2F15562618%2Fermend-bonnal_petite_elevation%2F&title=Petite+%C3%A9l%C3%A9vation was not found on this server. That’s all we know.