Sauliac, Cabrerets; on the banks of the Dordogne at Belcastel, La Cave, Le Bon Sairon, Mayronne, Blansaguet, Montvalent, Gluges, Saint Denis, &c., and between the rivers, Autoire, Gramat, S. Cirq d'Alzou, Rocamadour, S. Martin de Vers, Crass Guillot, to Vers among the high cliffs athwart which runs the Roman aqueduct, which in certain places, behind its high walls, could shelter a great number of the inhabitants. These caverns are still called Gouffios, Gouffieros, or Waiffers, from the name of Duke Waifre. [Footnote: Lacoste's derivation is absurd; Gouffieros comes from Gouffre, a chasm.] They were closed by a wall, of which there are remains at Canis, at Brengues, and at S. Jean de Laur, on the rock that commands the abyss of Lantoui. This last cavern is the most remarkable of all, as it is at but a little distance from the castle of Cénevières, which was one of the principal strongholds of the Duke of Aquitaine in Quercy." [Footnote: Lacoste, _Histoire de Quercy_, Cahors, 1883, i. pp. 267-8.] The wretched country had to suffer next from the expedition of the Northmen, who pushed up every river, destroying, pillaging, and showing no mercy to man or beast. The most redoutable of these pirates was Hastings, who ravaged the banks of the Loire between 843 and 850, sacked Bordeaux and Saintes and menaced Tarbes. In 866 he was again in the Loire, and penetrated as far as Clermont Ferrand. There seemed to be no other means of appeasing him than by granting him the country of Chartres. But this did not content his turbulent spirit, and at the age of nearly seventy he abandoned his county to resume his piracies. An Icelandic Saga relating the adventures of a Viking, Orvar Odd in Aquitaine, describes how he saw some of the natives taking refuge in an underground retreat, and how he pursued and killed them all. [Footnote: _Fornmanna Sögwr_, Copenhagen, 1829, ii. p. 229.]