"Why, of course I will go," he returned heartily, "and I will be ready whenever you are."
"About half an hour then."
He retired to the room upstairs, partly for the purpose of exchanging his coat, but also half tempted to make a hasty examination of the valise which Coolidge had thoughtlessly left overnight in the closet. The conception had already taken strong hold on his mind that his visitor of the evening before had been the mysterious impersonator of Natalie Coolidge; and that she had come there with some deliberate purpose--no-doubt a secret conference with Percival. If her resemblance to the mistress of the house was as remarkable as he had been led to believe, her entrance to the place would be comparatively easy of accomplishment, and the danger of discovery correspondingly small. It never occurred to him to question Natalie's story. To be sure there were details he found it difficult to fully accept as true, but the girl certainly believed all she had told him. She denied earnestly having been the one invading his room, and he believed her implicitly; yet the person who had visited him was so closely her image as to make it still seem almost an impossibility that she could be a separate individual. Nothing less than Natalie's own word would have brought conviction. And this person had supposed she was visiting the apartment occupied by Percival Coolidge. This was the only satisfactory explanation of her presence there; whether she came that night for the first time, or as a supplement to other similar visits, it was unquestionably Coolidge whom she sought.
For what purpose? To West's mind only one object appeared probable. The man was too far advanced in life--certainly much above sixty from his appearance--to be involved in a love affair with so young and attractive a woman. Moreover in such a case she would scarcely seek him out here in this private home, where he was merely a transient guest; he would never venture to use a place like this as a rendezvous. That was unthinkable. Some other purpose, demanding immediate attention, must furnish the reason for her venturing to enter this house at such an hour, and coming directly to the room where she supposed Coolidge to be sleeping. To West's mind there could be but one answer. The two were mutually involved in a conspiracy of some nature, undoubtedly connected with the approaching settlement of the Coolidge estate. This girl, so strangely resembling Natalie, had in some way been discovered by the scheming guardian, who was now using her for his own selfish ends. The plot had been carefully perfected, and the time must now be near for execution. This girl had been selected, and trained to act a part--the part of Natalie Coolidge. Her ability to deceive had been tested in various ways. Now the moment approached when they were ready to play out the real game. Yet the nature of that game was in no way apparent. He could only keep quiet, and wait for some further development, even appear indifferent, while he secretly watched every suspicious movement of Percival Coolidge.