Yet it seemed that the cause of the disturbance was unsuspected by Mr. Rushbrook. Mr. Leyton, although left to the consolation of cigars and liquors in the blue room, had become slightly weary of his companion's prolonged absence. Satisfied in his mind that Rushbrook had joined the gayer party, and that he was even now paying gallant court to the Signora, he became again curious and uneasy. At last the unmistakable sound of whispering voices in the passage got the better of his sense of courtesy as a guest, and he rose from his seat, and slightly opened the door. As he did so the figures of a man and woman, conversing in earnest whispers, passed the opening. The man's arm was round the woman's waist; the woman was--as he had suspected--the one who had stood in the doorway, the Signora--but--the man was NOT Rushbrook. Mr. Leyton drew back this time in unaffected horror. It was none other than Jack Somers! Some warning instinct must at that moment have struck the woman, for with a stifled cry she disengaged herself from Somers's arm, and dashed rapidly down the hall. Somers, evidently unaware of the cause, stood irresolute for a moment, and then more silently but swiftly disappeared into a side corridor as if to intercept her. It was the rapid passage of the Signora that had attracted the attention of Grace and Rushbrook in the study, and it was the moment after it that Mr. Rushbrook left. CHAPTER VI Vaguely uneasy, and still perplexed with her previous agitation, as Mr. Rushbrook closed the door behind him, Grace, following some feminine instinct rather than any definite reason, walked to the door and placed her hand upon the lock to prevent any intrusion until he returned. Her caution seemed to be justified a moment later, for a heavier but stealthier footstep halted outside. The handle of the door was turned, but she resisted it with the fullest strength of her small hand until a voice, which startled her, called in a hurried whisper:-- “Open quick, 'tis I.” She stepped back quickly, flung the door open, and beheld Somers on the threshold! The astonishment, agitation, and above all, the awkward confusion of this usually self-possessed and ready man, was so unlike him, and withal so painful, that Grace hurried to put an end to it, and for an instant forgot her own surprise at seeing him. She smiled assuringly, and extended her hand. “Grace--Miss Nevil--I beg your pardon--I didn't imagine”--he began with a forced laugh. “I mean, of course--I cannot--but”--He stopped, and then assuming a peculiar expression, said: “But what are YOU doing here?”