It was the summer of the year 1491, and the armies of Ferdinand and Isabel invested the city of Granada. The night was not far advanced; and the moon, which broke through the transparent air of Andalusia, shone calmly over the immense and murmuring encampment of the Spanish foe, and touched with a hazy light the snow-capped summits of the Sierra Nevada, contrasting the verdure and luxuriance which no devastation of man could utterly sweep from the beautiful vale below.