How to Sail from Norway to Greenland in Landnámabók (Book of Settlements), Part 1, Chapter I

So wise men say, that from Norway, out of Stad, there are seven half-days' sailing to Horn, in eastern Iceland, and from Snowfells Ness, where the cut is shortest, there is four days' main west to Greenland. But it is said, that if one sail from Bergen straight west to Warf, in Greenland, then one must keep about 12 miles (sea miles) south of Iceland, but from Reekness, in southern Iceland, there is five days' main to Jolduhlaup, in Ireland, going south; but from Longness, in northern Iceland, there is four days' main north to Svalbard, in Hafsbotn, but one day's sail there is to the Wastes of Greenland from Kolbein's Isle in the north.