The discovery of Mesolithic arrowheads on the Isles of Scilly with clearly continental European roots challenges the most deeply embedded ideas of Mesolithic specialists. While the disturbed stratigraphic context prevents a full understanding of the complete technical system, we must draw some conclusions regarding the Neolithic transition, and the ways and means of prehistoric navigation. At a more methodological level, this important discovery raises questions about our reading of features of technology, such as the nature of the transfers and whether they were exchanges or copies.