There is another Troglodyte town, also formerly walled, Les Roches, above Montoire. It is occupied by six hundred souls, and most of the houses are dug out of the rock. There is hardly space for the road to run between the Loir and the crags, and the church has to curl itself like a dog going to sleep to fit the area allowed it. This rock forms perpendicular bluffs of chalk tufa, and masses of fallen stone lie at their feet. Some rocks overhang, and the whole of this cliff and the fallen blocks have been drilled with openings and converted into habitations for man and for beast. Doors and windows have been cut in the stone, which has been hollowed out as maggots clear out the kernel of a nut. Rooms, kitchens, cellars, stables have been thus contrived. The chimneys run up the rocks, and through them; and on the plateau above open as wells, but are surrounded by a breastwork of bricks to protect them against the rain, which might form a rill that would decant playfully down the opening in a waterfall. In winter, when all hearths are lighted, the smoke issuing from all these little structures has the effect of a series of steaming saucepans. A little way up the river outside the walls is the Château de Boydan, half scooped out of the cliff, with pretty sixteenth century mullioned and transomed windows. At right angles to the rock a wing was thrown out to contain the state apartments with their fireplaces and chimneys. But unfortunately it was tacking on of new cloth to the old garment, and the face of the rock slid down carrying with it the side walls and windows, and has left the gable containing the handsome stone chimney- pieces and the chimneys as an isolated fragment. Just beyond, excavated in the bluff, is the chapel of S. Gervais, consisting of two portions, an outer and an inner chamber. But the cliff face had been cut for the windows too thin, and the whole slid away at the same time probably as the disaster happened to the castle, and has exposed the interior of this monolithic church. There are remains of frescoes on the wall painted with considerable spirit; a king on horseback blowing a horn, and behind him a huntsman armed with a boar-spear. Benches cut in the rock surround the sanctuary. Externally a niche contains a rude image of the saint.