Thule was described as an island six days' sailing north of Britain, near the frozen sea ("pepēguia thalatta", "solidified sea"). Pliny added that it had no nights at midsummer when the sun was passing through the sign of the Crab (at the summer solstice), a reaffirmation that it is on the Arctic Circle. He added that the crossing to Thule started at the island of "Berrice", "the largest of all", which may be Lewis in the outer Hebrides. If "Berrice" was in the outer Hebrides, the crossing would have brought Pytheas to the coast of Møre og Romsdal or Trøndelag, Norway, explaining how he managed to miss the Skagerrak. If this is his route, in all likelihood he did not actually circumnavigate Britain, but returned along the coast of Germany, accounting for his somewhat larger perimeter.