Rumours of the existence of Iceland, or Thule as it was then called, were first brought home by Pytheas, while Irish monks are known to have stayed there early in the ninth century, but probably the first attempt to colonise it was made by Thorold about a hundred years after Naddod’s visit. This worthy Viking, feeling it advisable to leave his native land after a quarrel with a relative, during the course of which the latter had been killed, set his course for Iceland, and made himself a new home there. Shortly afterwards his son Erik, who seems to have inherited his father’s taste for murder, followed him to his new abode, and later on, when on a voyage of adventure, set foot upon Greenland. Erik’s son, Leif, who was also of a roving disposition, sailed far westward in 100 A.D., and landed either on Newfoundland or at the mouth of the St Lawrence, thus anticipating the discovery of America by Columbus by nearly five hundred years. It was not until the end of the fifteenth century that the first serious attempts at Arctic exploration were made by John Cabot and his son Sebastian. John Cabot was a Venetian, who settled at Bristol probably about the year 1474, and to him belongs the honour of being the first to suggest the possibility of finding a north-west passage to India. In 1496 he received a commission from Henry VII. to sail out for the discovery of countries and islands unknown to Christian peoples, and though the real object of his voyage, discreetly veiled beneath these purposely vague terms, was not attained, he immortalised his name by the discovery of Nova Scotia and Cape Breton Island. The history of the earlier Cabot voyages is sadly obscure, and was rendered more so by Sebastian himself, who in his later years seems to have claimed discoveries which properly belonged to his father. Sebastian is unquestionably the hero of his own account of the expedition of 1496, which is given by Hakluyt:—