404. That’s an error.

The requested URL /bookmarks/mark?op=edit&bkmk=http%3A%2F%2Fdata.bnf.fr%2F13479609%2Fantonio_lopez_acuna%2F&title=Antonio+L%C3%B3pez+Acu%C3%B1a was not found on this server. That’s all we know.