Konig's paper was written at about the same time as Richard's (see above, p.142). Like Richard, Konig deals with the set of finitely definable numbers; but, instead of using a diagonal construction, he considers the complement of that set. If the set of real numbers could be well-ordered, the set of not finitely definable real numbers would have a first element, which, after all, would be finitely definable. Konig's conclusion is that the set of real numbers cannot be well-ordered.