The Mayor of the Palace must guard the royal demesnes, as far as possible, from the ravages of weather, wolves, or lawless men, for the King of the Franks, as much as any of his subjects, depended on the harvests and herds for his prosperity rather than on commerce or manufactures. By the end of the seventh century the Mayors of Austrasia had ceased to interest themselves merely in local affairs and had begun to extend their authority over the whole of France. Nominally, they acted in the name of the Merovingian kings, but once when the throne fell vacant they did not trouble to fill it for two years. The Franks made no protest: it was to their mayors, not to their kings, that they now turned whether in search of good government or daring national exploits. The Carolingian Charles ‘Martel’, Charles ‘the Hammer’, was a warrior calculated to arouse their profound admiration. ‘He was a Herculean warrior,’ says an old chronicle, ‘an ever-victorious prince ... who triumphed gloriously over other princes, and kings, and peoples, and barbarous nations: in so much that, from the Slavs to the Frisians and even to the Spaniards and Saracens, there were none who rose up against him that escaped from his hand, without prostrating themselves in the dust before his empire.’ It was Charles Martel who saved France from falling under the yoke of the Saracens, a race of Arabian warriors who, crossing from Africa at the Strait of Gibraltar, subdued in one short campaign three-quarters of Spain. Describing the first great victory over the Gothic King Rodrigo at Guadalete, the Governor of Africa wrote to his master the Caliph, ‘O Commander of the Faithful, these are no common conquests; they are like the meeting of the nations on the Day of Judgement.’