 He lays special stress on the Roman catechism and the catechism of Canisius.The deep veneration in which Haid, from his earliest youth, had held the latter found expression in his later writings, when he not only edited under different forms and translated the "Summa doctrinæ christianæ" of Peter Canisius, but also published some of the smaller works and a comprehensive biography of their author.During the closing years of his life he was afflicted with almost total blindness, but he bore his affliction with the greatest resignation.