It is incredible to those who have not experienced it, on what scanty aliment human life and human love may be supported. A dry crust, thrown now and then to a starving man, will give him a new lease of existence; and a faint smile, or a kind look, bestowed at casual intervals, will keep a lover loving on, when a man in his sober senses would despair. When Antonio found himself alone in the laboratory, his mind would be haunted by one of these looks, or smiles, which he had received in passing. He would set it in every possible light, and argue on it with all the self-pleasing, self-teasing logic of a lover. The country around him was enough to awaken that voluptuousness of feeling so favourable to the growth of passion. The window of the tower rose above the trees of the romantic valley of the Darro, and looked down upon some of the loveliest scenery of the Vega, where groves of citron and orange were refreshed by cool springs and brooks of the purest water. The Xenel and the Darro wound their shining streams along the plain, and gleamed from among its bowers. The surrounding hills were covered with vineyards, and the mountains, crowned with snow, seemed to melt into the blue sky. The delicate airs that played about the tower were perfumed by the fragrance of myrtle and orange-blossoms, and the ear was charmed with the fond warbling of the nightingale, which, in these happy regions, sings the whole day long. Sometimes, too, there was the idle song of the muleteer, sauntering along the solitary road; or the notes of the guitar, from some group of peasants dancing in the shade. All these were enough to fill the head of the young lover with poetic fancies; and Antonio would picture to himself how he could loiter among those happy groves, and wander by those gentle rivers, and love away his life with Inez. He felt at times impatient at his own weakness, and would endeavour to brush away these cobwebs of the mind. He would turn his thoughts, with sudden effort, to his occult studies, or occupy himself in some perplexing process; but often, when he had partially succeeded in fixing his attention, the sound of Inez's lute, or the soft notes of her voice, would come stealing upon the stillness of the chamber, and, as it were, floating round the tower. There was no great art in her performance; but Antonio thought he had never heard music comparable to this. It was perfect witchcraft to hear her warble forth some of her national melodies; those little Spanish romances and Moorish ballads, that transport the hearer, in idea, to the banks of the Guadalquivir, or the walls of the Alhambra, and make him dream of beauties, and balconies, and moonlight serenades.