the ruined chapel of S. Hilary remains. The people still reverence the pool, which they call the Father of Hail Storms, and till last century continued to cast offerings into the water. The visible result of the efforts of the good bishop so many centuries ago was no more than the construction of a chapel now in ruins.
It is probable enough that were the Lac de Bouchet drained, it would yield a rich spoil of coins. The lake is 2,800 feet across and 98 feet deep. In the morass occupying the bowl of Bar have been found a great many early coins, a necklace, and bracelets of bronze.
The loftiest of the Cevennes is Mézenc, on the frontier of Haute Loire. It is 5,750 feet high, and was at one time the central point of violent Plutonic eruptions. Several craters poured forth trachyte, phonolith, and basalt, which overflowed the granite, gneiss, clay deposits, and limestone to a great distance.
One of the craters, La Croix-des-Boutières, remains very distinct.
"The phonolith of which Mézenc is composed," says Elisée Reclus, "appears to have issued from the crater in a state of high fluidity, and to have spread very rapidly over the slopes of the crystalline plateau. The result is that the volcanic cones have, relatively to the anterior formations that support them, but a feeble elevation. The lavas which issued from the crater of Mézenc, of very unequal texture, have been attacked by storms, so as to represent a range of distinct cones on which grow forests of oak and pine."
If the map be studied, it will be seen that there are two features in the water system of this region that merit notice.
In the first place, we have the Allier on the west, and
