In the second reference is a reprint of an inventory, made at the time of the death of Santa Cruz, of his collection of maps, pictures, and manuscripts and especially referred to in the receipt given by Juan Lopez, his successor as Royal Cosmographer, mention being made of no less than eighty-seven items. [254] He seems to have produced nothing of special importance in his capacity as “Historicus Regius,” giving, however, some attention to the subjects of heraldry, and genealogy. The question of the determination of longitude interested him, and there is still preserved, in the Royal Library of Madrid, his manuscript bearing the title “Libro de las longitudes y manera que hasta ago se ha tenido en el arte de navegar con sus demonstraciones y examplos.” At the time of his death there was also left a paper in manuscript, treating of the subject of longitude, which probably contains a summary of suggestions made to the Junta in Sevilla in the year 1536 “sobre la orden que se ha tenido en el dar de la longitud.” [255] Wieser, F. R. v. Die Karten von Amerika in den Islario General des Alonso de Santa Cruz Cosmografo Mayor des Kaisers Karl V, mit der spanischen original Texte und einer Kritischen Einleitung. Innsbruck, 1908. This work was reviewed by Stevenson, E. L. (In: American Historical Review. 1910. pp. 392-394.) [256] Catalogue Général des Manuscrits des Bibliothèques Publiques de France. Department Tom. XXXII. Paris, 1897. p. 399; Harrisse. Discovery. p. 621. [257] Schuller, R. R. Arcerca del “Yslario General” de Alonso de Santa Cruz. London, 1913. (In: Proceedings of the XVIII Session of the International Congress of Americanists. London, 1913. Vol. II, pp. 415-432.); Islario general de todas las islas del mundo dirigido á la S. C. R. M. del rey don Phelipe miestro Señor por Alᵒ de Santa Cruz su cosmographo mayor, con grabados en el texto y varias láminas. (In: Boletin de la Sociedad Geografica de Madrid. Madrid, 1918, 1919.) [258] Harrisse. Discovery. p. 624; Nordenskiöld, Facsimile Atlas, p. 109, gives an excellent reproduction of this map. [259] Dahlgren, E. W. Map of the World by Alonzo de Santa Cruz, 1542. Stockholm, 1892. Dahlgren has given us an excellent facsimile of this map, with critical text including a summary of the work of Santa Cruz and a list of the names on the map. [260] See p. 150. [261] Raemdonck, J. v. Gérard Mercator, sa vie et ses oeuvres. St. Nicolas, 1869; Wauvermans, H. E. Histoire de l’école cartographique belge et anveroise au XVI siècle. Anvers, 1895. Vol. II, pp. 37-109; 174-213; Breusing, A. Gerhard Kremer, genannt Mercator, der deutsche Geograph. Duisbourg, 1869; Raemdonck, J. van. Gérard de Cremer ou Mercator, Géographe Flamand. Réponse à la Conférence du Dr. Breusing, tenue à Duisbourg le 30 mars, 1869. St. Nicolas, 1870; Hall, E. H. Gérard Mercator, his Life and Work. New York, 1878. pp. 163-196.