The first modern writer to call attention to the Icelandic voyages to Greenland and Vinland was Arngrim Jonsson, in his _Crymogoea_, Hamburg, 1610, and more explicitly in his _Specimen Islandiae historicum_, Amsterdam, 1643. The voyages are also mentioned by Campanius, in his _Kort beskrifning om provincien Nya Swerige uti America_, Stockholm, 1702. The first, however, to bring the subject prominently before European readers was that judicious scholar Thormodus Torfaeus, in his two books _Historia Vinlandiae antiquae_, and _Historia Gronlandiae antiquae_, Copenhagen, 1705 and 1706. Later writers have until very recently added but little that is important to the work of Torfaeus. In the voluminous literature of the subject the discussions chiefly worthy of mention are Forster's _Geschichte der Entdeckungen und Schiffahrten im Norden_, Frankfort, 1784, pp. 44-88; and Humboldt, _Examen critique_, etc., Paris, 1837, tom. i. pp. 84-104; see, also, Major, _Select Letters of Columbus_, London, 1847 (Hakluyt Soc.) pp. xii.-xxi. The fifth chapter of Samuel Laing's preliminary dissertation to the _Heimskringla_, which is devoted to this subject, is full of good sense; for the most part the shrewd Orkneyman gets at the core of the thing, though now and then a little closer knowledge of America would have been useful to him. The latest critical discussion of the sources, marking a very decided advance since Rafn's time, is the paper by Gustav Storm, professor of history in the University of Christiania, "Studier over Vinlandsreiserne," in _Aarboger for Nordisk Oldkyndighed og Historie_, Copenhagen, 1887, pp. 293-372.