The fiery cavaliers of Granada, eager to renew those forays into the Christian lands in which they had formerly delighted, concerted an irruption to the north, into the territory of Jaen, to harass the country about Quezada. They had heard of a rich convoy of merchants and wealthy travellers on the way to the city of Baza, and anticipated a glorious conclusion to their foray in capturing this convoy. Assembling a number of horsemen, lightly armed and fleetly mounted, and one hundred foot-soldiers, they issued forth by night from Granada, made their way in silence through the defiles of the mountains, crossed the frontier without opposition, and suddenly appeared, as if fallen from the clouds, in the very heart of the Christian country. The mountainous frontier which separates Granada from Jaen was at this time under the command of the count de Tendilla, the same veteran who had distinguished himself by his vigilance and sagacity when commanding the fortress of Alhama. He held his head-quarters at the city of Alcala la Real, in its impregnable fortress perched high among the mountains, about six leagues from Granada, and dominating all the frontier. From this cloud-capt hold he kept an eagle eye upon Granada, and had his scouts and spies in all directions, so that a crow could not fly over the border without his knowledge. His fortress was a place of refuge for the Christian captives who escaped by night from the Moorish dungeons of Granada. Often, however, they missed their way in the defiles of the mountains, and, wandering about bewildered, either repaired by mistake to some Moorish town or were discovered and retaken at daylight by the enemy. To prevent these accidents, the count had a tower built at his own expense on the top of one of the heights near Alcala, which commanded a view of the Vega and the surrounding country. Here he kept a light blazing throughout the night as a beacon for all Christian fugitives to guide them to a place of safety. The count was aroused one night from his repose by shouts and cries which came up from the town and approached the castle walls. “To arms! to arms! the Moor is over the border!” was the cry. A Christian soldier, pale and emaciated, who still bore traces of Moorish chains, was brought before the count. He had been taken as guide by the Moorish cavaliers who had sallied from Granada, but had escaped from them among the mountains, and after much wandering had found his way to Alcala by the signal-fire.