Meanwhile the man who, to all appearance, had just re-enacted before them the tragedy which had so lately taken place in this room, rose to his feet, and, with a dazed air as unlike his former violent expression as possible, stooped for the glass he had let fall, and was carrying it out when Mr. Gryce called to him:

"Wait, man! You needn't take that glass away. We first want to hear how your master comes to be lying here dead."

It was a demand calculated to startle any man. But this one showed himself totally unmoved by it, and was passing on when Styles laid a detaining hand on his shoulder.

"Stop!" said he. "What do you mean by sliding off like this? Don't you hear the gentleman speaking to you?"

This time the appeal told. The glass fell again from the man's hand, mingling its clink (for it struck the floor this time and broke) with the cry he gave—which was not exactly a cry either, but an odd sound between a moan and a shriek. He had caught sight of the men who were seeking to detain him, and his haggard look and cringing form showed that he realized at last the terrors of his position. Next minute he sought to escape, but Styles, gripping him more firmly, dragged him back to where Mr. Gryce stood beside the bearskin rug on which lay the form of his dead master.

Instantly, at the sight of this recumbent figure, another change took place in the entrapped butler. Joy—that most hellish of passions in the presence of violence and death—illumined his wandering eye and distorted his mouth; and, seeking no disguise for the satisfaction he felt, he uttered a low but thrilling laugh, which rang in unholy echo through the room.

Mr. Gryce, moved in spite of himself by an abhorrence which the irresponsible condition of this man seemed only to emphasize, waited till the last faint sounds of this diabolical mirth had died away in the high recesses of the space above. Then, fixing the glittering eye of this strange creature with his own, which, as we know, so seldom dwelt upon that of his fellow-beings, he sternly said:

"There now! Speak! Who killed this man? You were in the house with him, and should know."

The butler's lips opened and a string of strange gutturals poured forth, while with his one disengaged hand (for the other was held to his side by Styles) he touched his ears and his lips, and violently shook his head.

There was but one interpretation to be given to this. The man was deaf and dumb.

The shock of this discovery was too much for Styles. His hand fell from the other's arms, and the man, finding himself free, withdrew to his former place in the room, where he proceeded to enact again and with increased vivacity first the killing of and then the mourning for his master, which but a few moments before had made so suggestive an impression upon them. This done, he stood waiting, but this time with that gleam of infernal joy in the depths of his quick, restless eyes which made his very presence in this room of death seem a sacrilege and horror.

Styles could not stand it. "Can't you speak?" he shouted. "Can't you hear?"

The man only smiled, an evil and gloating smile, which Mr. Gryce thought it his duty to cut short.

"Take him away!" he cried. "Examine him carefully for blood marks. I am going up to the room where you saw him first. He is too nearly linked to this crime not to carry some trace of it away with him."

But for once even this time-tried detective found himself at fault. No marks were found on the old servant, nor could they discover in the rooms above any signs by which this one remaining occupant of the house could be directly associated with the crime which had taken place within it. Thereupon Mr. Gryce grew very thoughtful and entered upon another examination of the two rooms which to his mind held all the clews that would ever be given to this strange crime.

The result was meagre, and he was just losing himself again in contemplation of the upturned face, whose fixed mouth and haunting expression told such a story of suffering and determination, when there came from the dim recesses above his head a cry, which, forming itself into two words, rang down with startling clearness in this most unexpected of appeals:

"Remember Evelyn!"

Remember Evelyn! Who was Evelyn? And to whom did this voice belong, in a house which had already been ransacked in vain for other occupants? It seemed to come from the roof, and, sure enough, when Mr. Gryce looked up he saw, swinging in a cage strung up nearly to the top of one of the windows I have mentioned, an English starling, which, in seeming recognition of the attention it had drawn upon itself, craned its neck as Mr. Gryce looked up, and shrieked again, with fiercer insistence than before:

"Remember Evelyn!"

It was the last uncanny touch in a series of uncanny experiences. With an odd sense of nightmare upon him, Mr. Gryce leaned forward on the study table in his effort to obtain a better view of this bird, when, without warning, the white light, which since his last contact with the electrical apparatus had spread itself through the room, changed again to green, and he realized that he had unintentionally pressed a button and thus brought into action another slide in the curious lamp over his head.

Annoyed, for these changing hues offered a problem he was as yet too absorbed in other matters to make any attempt to solve, he left the vicinity of the table, and was about to leave the room when he heard Styles's voice rise from the adjoining antechamber, where Styles was keeping guard over the old butler:

"Shall I let him go, Mr. Gryce? He seems very uneasy; not dangerous, you know, but anxious; as if he had forgotten something or recalled some unfulfilled duty."

"Yes, let him go," was the detective's quick reply. "Only watch and follow him. Every movement he makes is of interest. Unconsciously he may be giving us invaluable clews." And he approached the door to note for himself what the man might do.

"Remember Evelyn!" rang out the startling cry from above, as the detective passed between the curtains. Irresistibly he looked back and up. To whom was this appeal from a bird's throat so imperatively addressed? To him or to the man on the floor beneath, whose ears were forever closed? It might be a matter of little consequence, and it might be one involving the very secret of this tragedy. But whether important or not, he could pay no heed to it at this juncture, for the old butler, coming from the front hall whither he had hurried on being released by Styles, was at that moment approaching him, carrying in one hand his master's hat and in the other his master's umbrella.

Not knowing what this new movement might mean, Mr. Gryce paused where he was and waited for the man to advance. Seeing this, the mute, to whose face and bearing had returned the respectful immobility of the trained servant, handed over the articles he had brought, and then noiselessly, and with the air of one who had performed an expected service, retreated to his old place in the antechamber, where he sat down again and fell almost immediately into his former dazed condition.

"Humph! mind quite lost, memory uncertain, testimony valueless," were the dissatisfied reflections of the disappointed detective as he replaced Mr. Adams's hat and umbrella on the hall rack. "Has he been brought to this state by the tragedy which has just taken place here, or is his present insane condition its precursor and cause?" Mr. Gryce might have found some answer to this question in his own mind if, at that moment, the fitful clanging of the front door bell, which had hitherto testified to the impatience of the curious crowd outside, had not been broken into by an authoritative knock which at once put an end to all self-communing.

The coroner, or some equally important person, was at hand, and the detective's golden hour was over.