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Of the six , historians have traditionally attributed significant influence only to Queen Constance , and that seems to have been a reflex of the literary development . This version obviously derives from an epic tale but the literary version at least built on the historic facts of the count 's exile and Urraca 's implication in it if only perhaps through loyal support to the [ 333 ] interests of her husband , Count Raymond . The very size of the supply train that had accompanied them was thus a significant counter in the negotiations that would result in the capitulation of the city . Lugo was a city that had long been especially loyal to her , and its bishop was her former chaplain . At the same time the propagation of water mills , by shifting the labor of milling grain from human to mechanical power , would also have acted to enlarge the acreage feasible to be worked economically by a single farmer . Humble folk were usually occupied helping along the carts which strained on steep , uphill gradients and were , so far as we know , unequipped with brakes for the long , downhill ones . In any event , royal councils must have considered the state of the king 's marital affairs with wry humor and quiet desperation .