One has but to look through the brief notices of towns and villages in Joanne's Departmental Geographies to see what a number of these refuges are already known to exist in France. And he records, be it remembered, only the most interesting. There are thousands more that have either not yet been discovered or remain unexplored. Some are revealed by accident; a peasant is ploughing, when his oxen are suddenly engulfed, and he finds that they have broken through the roof of one of these hiding-places. A gentleman is building his chateau, when in sinking his foundations he finds the rock like a petrified sponge--but not like a sponge in this, that the galleries are artificial. A _paysan_ lets himself down his well to clean it out, as the water is foul. He finds that in the side of the shaft is the opening of a passage; he enters, follows it, and finds a labyrinth of galleries. As an instance of the abundance of the _souterrains_ in France, I will take the department of Vienne and give in a note below a list of the communes where they are known to be, from _De Longuemar, Géographie du dep. de la Vienne_, Poitiers, 1882, and also from several editions of Joanne's Geography. [Footnote: Natural grottoes that may have served as refuges are not included. Availles, Bellefonds, Béthines, Béruges, Bonnes, Bussières, Château Gamier, Champniers, Curzay, Civeaux, Gouex, Ingrandes, S. Julien Lars, Jazneuil, Leugny- sur-Creuse, Loudun, Lautiers, Lusignan, Marnay, Mairé-le-Gautier, S. Martin-Lars, S. Martin-la-Rivière, Maslou Montmorillon, Mazerolles, Mondion, Maulay, Montreuil-Bonnin, Naintré, Prinçai, Romagne, S. Remy- sur-Creuse, Saulgé, Nouvaille, Persac, S. Savin, Sossais, Thuré, Usson, Varennes, Le Vigean, Vénièrs, Vellèches, Verrières, Venneuil-sur-Biard. Several of these are under churches, others under castles. At some of these places are three or more distinct _souterrains._]