LANWIN GRANGE.
In the exercise of his profession, a legitimate detective would have waited to question Mrs. Rover. Since she had said so much he would have forced her to say all, in order to get at the truth as speedily as possible; but Lord Prelice was new to the business, and his emotions were not entirely under control. On leaving Alexander Mansions he felt that he was in possession of a most dangerous and perilous secret, the publication of which would cause even a greater sensation than that produced by the crimes themselves. The shock of learning that Mrs. Rover was the woman who had been brought by Agstone into Number Forty was very great, and quite confused Prelice's usually strong brain. He did not dare to call again on Shepworth, lest he should say too much.
It will be seen that Prelice, being an untrained detective, jumped somewhat hastily to a conclusion. Mrs. Rover had admitted that she wore the dress, the mask, and the domino which Shepworth had seen on the unknown lady. But Constance did not know that Ned had so described her appearance, and, if she had, would probably not have admitted that she had assumed such a costume at her bal masque. But the mere fact that, even in ignorance of Shepworth's description, she had, as the saying goes, given herself away, should have proved to Lord Prelice that she could not be guilty. Had Mrs. Rover entered Number Forty in Agstone's company, and had she struck the blow, she assuredly would not have incriminated herself so unthinkingly. Rather would she have denied that the frock mentioned by Prelice belonged to her.
After the first shock, and while Prelice was in the train going to Hythe, he began to revise his earlier opinion on the above-mentioned grounds. His common-sense came to his aid, and told him that, if guilty, Mrs. Rover would not have confessed even to a half-truth. Certainly, had she not done so, her maid, knowing what dress her mistress wore at the ball, might have blurted out the secret; but then, so far as the world knew, no inquiry would have been made about the wearer of that especial frock.
Of course, assuming that in a thoughtless moment Mrs. Rover had foolishly confessed the truth, Prelice could find a motive for her behaviour in committing the crime. It might be that Agstone wished to kill Ned, and that Mrs. Rover, to save the life of the man she loved, had struck down the sailor unawares. Having committed the deed, she could easily slip back to her own flat, and mingle with the masked crowd.
But then again, as Prelice further argued, while the train drew near to the coast, Mrs. Rover must have known that in murdering Agstone she was not only securing the freedom of Mona Chent, whom she hated, but also was placing her lover in a dangerous position. Agstone was a necessary witness for the prosecution, whom Shepworth of all men did not wish to see placed in the box, so the supposition would be, were the man found dead in Number Forty, that Shepworth had killed him to save Mona Chent. As a matter of fact, this is exactly what had taken place, and in saving Ned from the sailor's knife Mrs. Rover, always presuming that she was guilty, had simply condemned her lover to a death on the scaffold. But that Prelice had been clever enough to admit the crowd of guests, so that all might see the barrister's helpless position, it is certain that the man would have been arrested, and probably sentenced to death, since it would have been extraordinarily difficult for him to clear his character in the face of circumstances. Therefore on these assumptions, for that they were and no more, Prelice after much reflection decided that Mrs. Rover was innocent.
Finally, the young man recollected that a woman dressed as described, by Ned, and in the costume which Mrs. Rover confessed to wearing, had passed down the stairs while he was waiting for entrance to Number Forty and immediately before the discovery of the crime. She could scarcely have been Mrs. Rover, for as that lady could have easily proved an alibi by returning to her guests and casually unmasking at the right moment, it would have been useless for her to leave the mansions. Of course, the lady—whether Mrs. Rover or a stranger—certainly might have followed Prelice down to the door, knowing that he would be certain to discover the tragedy, and might merely have descended to return to the ballroom overhead when the young man entered Shepworth's flat. But then, again, the person in question could not have known that Prelice, masked and unknown, was going to enter Number Forty, so there would be no reason to track him there. And to conclude, the murderess—if a woman was guilty—must have known that Shepworth, being in a cataleptic state, must have seen and remembered her very peculiar frock.
On the whole, Prelice arrived at certain conclusions, by no means inimical to Mrs. Rover, by the time he alighted at Hythe Station. He believed that Constance was innocent for four reasons. Firstly, if guilty, she would not have confessed to wearing the dress, since such a confession would necessarily lead to her detection. Secondly, by killing Agstone she would not only have placed Shepworth in a dangerous position, but by getting rid of an inconvenient witness would have enabled Mona to escape possible condemnation. Thirdly, she would not have followed an unknown man—as Prelice was by reason of his mask and domino—down the stairs with the intention of seeing what took place. Fourthly, and lastly, she would not have sought safety in an incriminating flight—as the similarly dressed woman on the stairs apparently had—when she would have been much safer in her own ballroom and amongst her own guests. Only by such a course could she have provided an alibi.
No! Mrs. Rover, in spite of her startling admission, was innocent, and the sole conclusion that Prelice could arrive at, was the existence of a double—outwardly at all events. He remembered the extraordinary ubiquity of the green domino in the red-streaked white dress, and decided, very naturally, that there was another woman in the field. But what woman possessed a motive sufficiently strong to urge her to murder Agstone? As Prelice felt quite worn out with arguing in Mrs. Rover's defence, he decided to leave the answering of this new question to the portentous moment, when further evidence might reveal the identity of the unknown lady. Meanwhile, on arriving at Hythe, he rested himself at a quiet hotel, and soothed his troubled brain with an hour's necessary sleep. Later on, after an invigorating bath and an excellent dinner, he started to walk towards Lanwin Grange.
It was summer, and romance was in the air—at least Prelice scented its presence by some sixth sense. He was going to see the girl he loved—the girl with whom he had not, as yet, exchanged a single word. Therefore, although past the peacock age, he was particularly attentive to his appearance when assuming his evening clothes. As he strolled inland along the leafy lanes, through the July warmth of the twilight, this somewhat premature wooer looked as comely and well groomed a swain as any damsel, not demanding an Apollo, could desire. And it was a great proof of Prelice's infatuation that, in looking forward to meeting Mona, he almost forgot that he was merely the emissary of the man to whom the girl was engaged. The whole position was extraordinarily queer. He adored this girl, without being personally acquainted with her; she was affianced to his best friend; and yet he could not be certain if that same best friend really loved the girl herself. Even a Palais Royal farce could offer no more fantastic complication than this. Prelice felt that, after running round the wild world in search of the unusual, he had returned to find Romance sitting on his doorstep.