Slowly the masked woman retreated from one apartment to another till she entered a corridor brilliantly lighted up and beautifully ornamented with flowers. On the right hand this corridor led to the ballroom; on the left to an ante-chamber at the head of the palace staircase. The Yellow Mask went on a few paces toward the left, then stopped. The bright eyes fixed themselves as before on Fabio’s face, but only for a moment. He heard a light step behind him, and then he saw the eyes move. Following the direction they took, he turned round, and discovered Nanina, wrapped up in the old cloak which was to enable her to get downstairs unobserved. “Oh, how can I get out? how can I get out?” cried the girl, shrinking back affrightedly as she saw the Yellow Mask. “That way,” said Fabio, pointing in the direction of the ballroom. “Nobody will notice you in the cloak; it will only be thought some new disguise.” He took her arm as he spoke, to reassure her, and continued in a whisper, “Don’t forget to-morrow.” At the same moment he felt a hand laid on him. It was the hand of the masked woman, and it put him back from Nanina. In spite of himself, he trembled at her touch, but still retained presence of mind enough to sign to the girl to make her escape. With a look of eager inquiry in the direction of the mask, and a half suppressed exclamation of terror, she obeyed him, and hastened away toward the ballroom. “We are alone,” said Fabio, confronting the gleaming black eyes, and reaching out his hand resolutely toward the Yellow Mask. “Tell me who you are, and why you follow me, or I will uncover your face, and solve the mystery for myself.” The woman pushed his hand aside, and drew back a few paces, but never spoke a word. He followed her. There was not an instant to be lost, for just then the sound of footsteps hastily approaching the corridor became audible. “Now or never,” he whispered to himself, and snatched at the mask. His arm was again thrust aside; but this time the woman raised her disengaged hand at the same moment, and removed the yellow mask. The lamps shed their soft light full on her face. It was the face of his dead wife. CHAPTER IV. Signor Andrea D’Arbino, searching vainly through the various rooms in the palace for Count Fabio d’Ascoli, and trying as a last resource, the corridor leading to the ballroom and grand staircase, discovered his friend lying on the floor in a swoon, without any living creature near him. Determining to avoid alarming the guests, if possible, D’Arbino first sought help in the antechamber. He found there the marquis’s valet, assisting the Cavaliere Finello (who was just taking his departure) to put on his cloak.