[Sidenote: Clavus's later map and text, and their genesis]
After the first map was drawn, Clavus may have made further cartographical studies in Italy, and may thus have become acquainted with other compass-charts, especially those of the Dalorto type. At the same time he may have obtained a new and more accurate determination of the latitude of Trondhjem, probably by the length of its longest day. As Trondhjem was an archbishopric, it is not unlikely that he found such a piece of information in the papal archives at Rome. He may then naturally have wished to bring his map more into agreement with his new knowledge, and this may have led to his later map, which is now known to us through several somewhat varying copies. To this he then wrote a new text (the Vienna text), which in all important points resembles the former, but has various additions and alterations. The later map has not the double scale of latitude on any of the copies known, but curiously enough only Ptolemy's degrees. Besides a more accurate delineation of Jutland and the Danish islands, especially Sealand, Bornholm and Gotland are drawn in closer resemblance to the Medici map; the south coast of Scandinavia has been altered to agree more with compass-charts of the Catalan type. In particular the south coast of Norway has been given the four characteristic promontories (as on the Dalorto map of 1339, and on the Modena map, etc.; cf. the reproductions, pp. 226, 231), and Bergen ("Bergis") has been placed at the head of the westernmost of the three bays thus formed, which is also a peculiarity of the maps of this type (the Catalan chart of 1375 has five promontories with four bays, cf. Nordenskiöld, 1896, Pl. XI.). The other two diocesan towns, Stavanger and Hamar, are placed at the heads of the other two bays to the east, and Stavanger has thus lost the remarkably correct position in relation to Bergen and the south point of Greenland which it had on the older map. Trondhjem has been placed at the extremity of the westernmost promontory, possibly because there had been found a more correct determination of the latitude of the town, which was to be fitted into Ptolemy's graduation; thereby the shape of Norway has become still narrower and farther removed from reality.