The boat shoots under the Pont de l'Arc; the rock that has been pierced is ninety feet thick. As already said, a fortress stood above, destroyed by Louis XIII., on a bit of rising ground on the left bank. There are still remains of the octagonal tower and enclosing wall and of some of the chambers tenanted by the garrison. But it was an _oppidum_, a place of refuge from prehistoric times, as early stone weapons, and later Gallo-Roman ware, have been found there, as well as accumulations of pebbles to serve as sling-stones. The road down the river ends at Chames, where is a boatman, who lives by fishing and ferrying over any of the inhabitants of S. Remèze or la Bastide de Verac, who desire to cross. A stream issues from a grotto; it is the Fontaine de Vamale. The cave is apparently closed at the end, but on entering one finds on the right hand an opening into a valley, giving access to a terrace above the river, lighted by the setting sun, in which luxuriate lavender, Judas trees, evergreen dwarf oaks, juniper, and wild asparagus. This tiny valley is bounded on the west by a lofty calcareous wall in which is a rent, and a narrow path leads up this gap among bushes to the top of the plateau. It is by this track that the inhabitants of Vic descend and ascend before or after crossing the river. Hard by is a natural cave on the right bank, partly closed by a wall, so overgrown with ivy that were it not pointed out one might pass without discovering that man built himself a residence here. This is called the Castle of Ebbo, and the tradition is current that the Templars of La Madeleine fled to it and hid there when sentence had gone forth against them by Philip the Fair in 1312; but it was probably a post that belonged to the Seigneur of Verac to watch his fisheries. Chames is a little hamlet on the left bank of the Ardèche, where the rocks fall back and allow of slopes on which can grow olive trees, vines, plums, and almonds. The water is here still and seems transformed to a mirror, so that from the opposite side, that of the Castle of Ebbo, when the sun is full on the white cottages and gleaming limestone rocks, they as well as the fruit trees are reflected with intensity in the glassy surface.