Meanwhile another student, Joachim Watt, a native of St. Gall, in Switzerland, now about thirty years old, who had been a student of Camers, and who is better known by the latinized form of his name, Vadianus, had, in November, 1514, addressed a letter to Rudolfus Agricola, in which he adopted the suggestion first made by Waldseemüller that the forename of Vespucius should be applied to that part of the New World which we now call Brazil. This letter was printed at Vienna (1515) in a little tract,—_Habes, Lector, hoc libello, Rudolphi Agricolæ Junioris Rheti ad Jochimum Vadianum epistolam_,—now become very rare. It contains also the letter of Agricola, Sept. 1, 1514, which drew out the response of Vadianus dated October 16,—Agricola on his part referring to the work on Mela which was then occupying Vadianus (a copy owned by Stevens, _Bibliotheca geographica_, no. 2,799, passed into the Huth Library, _Catalogue_, v. 1506. Harrassowitz has since priced a copy, _Catalogue_, List 61, no. 57, at 280 marks). The _De situ orbis_ of Mela, as edited by Vadianus, came out finally in 1518, and contained one of the two letters,—that of Vadianus himself; and it is in this reproduction that writers have usually referred to its text (Harrisse, _Bibl. Amer. Vet._, no. 92; Murphy, no. 2,004; Leclerc, no. 458; Sunderland, no. 10,120; Graesse, v. 401; Carter-Brown, i. 55). Camers also issued at the same time an edition uniform with the Aldine imprint of Solinus; and this and the Mela are often found bound together. Two years later (1520) copies of the two usually have bound up between them the famous cordiform map of Apian (Petrus Apianus, in the Latin form; Dienewitz, in his vernacular). This for a long time was considered the earliest engraved map to show the name of America, which appeared, as the annexed fac-simile shows, on the representation of South America. There may be some question if the map equally belongs to the Mela and to the Solinus, for the two in this edition are usually bound together; yet in a few copies of this double book, as in the Cranmer copy in the British Museum, and in the Huth copy (_Catalogue_, iv. 1372), there is a map for each book. There are copies of the Solinus in the Carter-Brown, Lenox, Harvard College, Boston Public, and American Antiquarian Society libraries (cf. Harrisse, _Notes on Columbus_, p. 175; _Bibl. Amer. Vet._, no. 108; Murphy, no. 2,338; Trübner, 1876, £15 15s.; Weigel, 1877, 240 marks; Calvary, 1883, 250 marks; Leclerc, 1881, no. 2,686, 500 francs; Ellis & White, 1877, £25). The inscription on the map reads: “Tipus orbis universalis juxta Ptolomei cosmographi traditionem et Americi Vespucii aliosque lustrationes a Petro Apiano Leysnico elucbrat. An. Do. M.D.XX.” Harrisse (_Bibl. Amer. Vet., Additions_, no. 68) cites from Varnhagen’s _Postface aux trois livraisons sur Vespucci_, a little tract of eight leaves, which is said to be an exposition of the map to accompany it, called _Declaratio et usus