Page:A book of the Cevennes (-1907-).djvu/177

Rh sulphuretted hydrogen, which phthisic patients inhale eagerly. When the water falls it is sucked back into the bore.

The splendid ruins of the Castle of Boulogne attract a host of visitors from Vals annually during the season. It is reached by carriage, quitting the high road from Aubenas to Privas by a branch road from Auriolles to S. Etienne. The castle was built by a Count of Valentinois in the eleventh century. It remained in the hands of the Grimaldi, Counts of Valentinois, to 1344. In 1384 it became the property of the Lestranges, and they retained it to 1579; when it passed to the de Hautefort de Lestranges till 1632. After that it shifted proprietors rapidly. At the Revolution it belonged to Fay-Gerlande till 1794, when it was sold. The