As it was perceived that all negotiations would be in vain if the consent of Luther were not obtained, a deputation headed by John of Anhalt arrived at Wittenberg, where Luther resided, on 9 June. Luther answered in a polite and almost diplomatic way. He expressed satisfaction in reference to the agreement on some of the articles, but did not believe in the sincerity of his opponents and made his consent dependent upon conditions which he knew could not be accepted by the Roman Catholics.