The "Saga of Erik the Red" and the "Saga of the Greenlanders", both thought to have been written around 1200, contain different accounts of the voyages to Vinland. The only two known strictly historical mentions of Vinland are found in the work of Adam of Bremen and in the "Book of Icelanders" compiled by Ari the Wise. According to the "Saga of Erik the Red", Leif apparently saw Vinland for the first time after being blown off course on his way to introduce Christianity to Greenland.