In the Palace of the King by F. Marion Crawford

Dolores had not understood her father's words. All that was clear to her was that Don John was dead and that his murderers were gone. Had there been danger still for herself, she could not have felt it; but there was none now as she laid her hand upon the key to enter the bedchamber. At first the lock would not open, as it had been injured in some way by being so roughly shaken when Mendoza had tried it. But Dolores' desperate fingers wound themselves upon the key like little ropes of white silk, slender but very strong, and she wrenched at the thing furiously till it turned. The door flew open, and she stood motionless a moment on the threshold. Mendoza had said that Don John was dead, but she had not quite believed it.

He lay on his back as he had fallen, his feet towards her, his graceful limbs relaxed, one arm beside him, the other thrown back beyond his head, the colourless fingers just bent a little and showing the nervous beauty of the hand. The beautiful young face was white as marble, and the eyes were half open, very dark under the waxen lids. There was one little spot of scarlet on the white satin coat, near the left breast. Dolores saw it all in the bright light of the candles, and she neither moved nor closed her fixed eyes as she gazed. She felt that she was at the end of life; she stood still to see it all and to understand. But though she tried to think, it was as if she had no mind left, no capacity for grasping any new thought, and no power to connect those that had disturbed her brain with the present that stared her in the face.