Dürer likewise undertook the drafting and engraving of a celestial map (Fig. 46), than which of this character there appears to be none earlier known. It was not so drawn as to make possible its application to the surface of a sphere, but its reshaping for that purpose could not have been for him a difficult proposition. He, with others of this time, was giving thought to the problem of globe-gore construction. [Illustration: Fig. 46. Northern Celestial Hemisphere of Albrecht Dürer.] NOTES [124] The illustrations given are typical, and to one familiar with the works of the period on geographical and astronomical subjects, others suggest themselves. [125] For popular accounts of the Este family of Ferrara, see Gardner, E. G. Princes and Poets of Ferrara. London, 1904; Cartwright, J. Isabella d’Este. London, 1903. [126] Harrisse. Discovery. pp. 422-425; same author, Les Corte-Real et leur voyages au Nouveau Monde. Paris, 1883, with reproduction of the western half of the map, in colors; Stevenson, E. L. Maps illustrating early discovery and exploration in America. New Brunswick, 1906. No. 1 of this series is a reproduction of the Cantino map in the size of the original. [127] Fischer, J. The Discoveries of the Norsemen in America. London, 1903. pp. 112-118. Professor Fischer enjoys the distinction of being the foremost living authority on Ptolemy. [128] D’Arco, C. Delle arti e degli artefici di Mantova. Mantova, 1857. Vol. II, p. 53. [129] Bertolotti, A. Artisti in relazione coi Gonzaga Signori di Mantova. Modena, 1885. p. 143. (In: Estr. dagli Atti e Memorie delle Deputazioni di storia patria per le Provincie Modenesi e Parmensi. Série III, Vol. III, parte 1.) [130] Harrisse. Discovery. p. 434. [131] Denza, F. Globi celesti della Specola Vaticana. (In: Publicazioni della Specola Vaticana. Torino, 1894. Vol. IV, p. xvii.) [132] Fiorini, op. cit., pp. 88-89. [133] See the edition of Ptolemy. Geographia—MDVIII. Rome. Chap. xii. [134] Fiorini, op. cit., pp. 94-96, the citation being made from Badia, Jodoco del. La bottega di Alessandro di Francesco Rosselli merciaje e stampatore (1525). (In: Miscellanea fiorentina di erudizione e storia. Luglio, 1894. Vol. II, p. 14.) [135] Zach, F. v. Monatliche Korrespondence. Gotha, 1806. Vol. XIII, p. 157. Harrisse. Discovery. pp. 445-446. [136] Fiorini, op. cit., p. 99. [137] Fiorini, op. cit., p. 101. [138] Fiorini, op. cit., p. 72. [139] Fiorini, op. cit., p. 102. Of the further interest taken by Cardinal Salviati in geography, see Stevenson, op. cit., No. 7. [140] Trithemius. Epistolae familiares. Haganoae, 1536. p. 294. [141] This is part of the letter of August 12. [142] D’Avezac, M. A. P. Martin Hylacomylus Walzemüller ses ouvrages et ses collaborateurs. Paris, 1867; Gallois. Les Géographes. Chap. iv. “L’école Alsacienne-Lorraine”; Schmidt, C. Histoire littéraire de l’Alsace a la fin du XVᵉ et au commencement du XVIᵉ siècle. Paris, 1879.