In the morning, M. Durassier took me on a tour of the major megalithic alignments at Carnac, near the coast. There are four large groups — from west to east, Ménec, Kérabus, Kermario and Kerlescan. In between Kermario and Kerlescan there is a strange quadrilateral assembly of stones, tightly spaced, unlike anything I’ve seen in the U.K., and near it is the largest of the menhirs, an immense phallic stone called “le géant de Mario”. Every stone I’ve seen so far has been the same sort of granite, though most are coated with so much lichen that it’s hard to see the texture. Nothing resembles the bluestone in Wiltshire sites.