Five little pamphlets with texts in a new face of Round Gothic on English body, and with chapter headings in types resembling the text types of the _Bible of 42 lines_, have been attributed to Gutenberg. They are: _A Treatise on the Celebration of the Mass_,[272] a book of 30 leaves; _A Calendar_, or _An Almanac_ for 1460, in Latin, a quarto of 6 leaves; _The Mirror of the Clergy_, by Hermann of Saldis, “happily perfected and printed at Mentz,” a quarto of 16 leaves; _A Treatise on the Necessity of Councils_, etc., a quarto of 24 leaves; _A Dialogue between Cato, Hugo and Oliver about Ecclesiastical Liberty_, [p437] a quarto of 20 leaves.[273] It is possible, but not certain, that Gutenberg printed these books. _A Treatise on Reason and Conscience_,[274] by Matthew of Cracow, a small quarto of 22 leaves, and _A Summary of the Articles of Faith_, by Thomas Aquinas, a quarto of 12 leaves, printed in the types of the _Catholicon_, may be confidently accepted as the work of Gutenberg. But one copy or fragment of some of these works is known. Gutenberg may have printed many other works which have been destroyed and forgotten.[275] [Illustration: Fac-simile of the Types of the Treatise on the Celebration of the Mass. [From Fischer.]] The existing copies or fragments of pamphlets and books printed before 1462 are enough to prove that printing met [p438] with a qualified degree of appreciation. Gutenberg and Fust must have given employment to many presses and workmen: there was a demand for printed work of all kinds from almanacs to dictionaries, and the printers had reason to believe that they would be amply rewarded for their labor. Their hopes were destroyed by the sack of Mentz in 1462. [Illustration: Fac-simile of the Types of The Mirror of the Clergy. [From Bernard.]] The city of Mentz then held the first place in the league of the free cities of the Rhine, but her prosperity[276] was declining. Unceasing civil strifes had driven away the more feeble part of her population. In 1461, it was the wreck of its earlier greatness: it had but 50,000 inhabitants and was burdened with debt. Diether, Count of Isenburg, was then archbishop and elector of the city, by the consent of the majority of the inhabitants; but the rival archbishop, Adolph II, Count of Nassau, supported by Pope Pius II, claimed the archbishopric, and made war upon Diether. The consequences of the war, which nearly ruined the city, are forcibly stated by Schaab. [p439]