'You sang to me a year ago, my son,' he said at length to Stradella. 'Go now and stand a little way off and make music, for though I am old I hear well; and do your best, for I will be your judge. If I find you have even greater mastery than last year, your skill shall atone for your rude handling of my nephew; but if you sing less well, you must have an opportunity of practising and perfecting your art in solitude for a few months.'

If Stradella had dared to glance at the kindly face just then, he would certainly have noticed how the dark eyes brightened, and almost twinkled. But Ortensia, being a woman, and still full of girlhood's innocent daring, was boldly looking up at the Pope while he spoke; and he smiled at her, and one shadowy hand went out and rested on the black veil she had pinned upon her hair.

'Go and stand near your husband while he sings to me,' he said. 'You will give him courage, I am sure!'

The two rose together, and Stradella took up the lute he had laid beside him on the floor when he had knelt down at the Pope's feet. He and Ortensia stepped back half-a-dozen paces, and the musician stood still, but Ortensia moved a little farther away and to one side. The windows were wide open to the west, and the rich evening light flooded the white and gold room, and illumined the figure of the aged Pope, the strong features of the tall grey-haired Cardinal beside him, and the two young faces of the singer and his wife.

Stradella's heart beat fast and faintly, and his fingers trembled when they touched the strings and made the first minor chord. As long as he lived he remembered how at that very moment two swallows shot by the open window, uttering their eager little note; the room swam with him, and he thought he was going to reel and fall. For a moment he saw nothing and knew nothing, except that he had reached the end of the short prelude on the lute, and that he must find voice to sing for his liberty and Ortensia's, if not for his life.

'Pietà, Signore——'

The first words broke from his chilled lips in a low cry of despair, so strange and moving, and yet so musical, that the Cardinal started visibly, and the Pope raised his white head and looked slowly down the room, as if some suffering creature must be there at the very point of death, and crying low for pity and forgiveness. Even Ortensia, who had heard all, could not believe her ears, though she knew her husband's genius well.

'Signor pietà——' he sang again.

Fear was gone now, but art poured out the appeal for pardon with supreme power to move, roused to outdo itself, perhaps, by that first piteous cry that had broken from the master-singer's lips. The plaintive notes floated on the golden air as if a culprit spirit were pleading for forgiveness at the gates of paradise, a wonder to hear.

Ortensia held her breath, her eyes fixed on the aged Pontiff's rapt face; for he was gazing at the singer while he listened to a strain such as he had never heard in all his eighty years of life; and his kind old eyes were dewy with compassion.