Controversial results of recent carbon dating work, published in the journal "Skírnir", suggest that Iceland may have been settled as early as the second half of the seventh century. The "Íslendingabók" of Ari Thorgilsson claims that the Norse settlers encountered Gaelic monks from a Hiberno-Scottish mission when they arrived in Iceland. There is some archaeological evidence for a monastic settlement from Ireland at Kverkarhellir cave, on the Seljaland farm in southern Iceland. Sediment deposits indicate people lived there around 800, and crosses consistent with the Hiberno-Scottish style were carved in the wall of a nearby cave.