She had bounded toward the wall and was now on her knees pointing to the bottom of the wainscot, just a few inches to the left of the fallen page.
"A crack!" she cried, "under what was once the door. It's a very thin one, hardly perceptible to the eye. But see!" Here she laid her finger on the fallen paper and drawing it towards her, pushed it carefully against the lower edge of the wainscot. Half of it at once disappeared.
"I could easily slip it all through," she assured them, withdrawing the sheet and leaping to her feet in triumph. "You know now where the missing page lies, Mr. Spielhagen. All that remains is for Mr. Van Broecklyn to get it for you."
IV
The cries of mingled astonishment and relief which greeted this simple elucidation of the mystery were broken by a curiously choked, almost unintelligible, cry. It came from the man thus appealed to, who, unnoticed by them all, had started at her first word and gradually, as action followed action, withdrawn himself till he now stood alone and in an attitude almost of defiance behind the large table in the centre of the library.
"I am sorry," he began, with a brusqueness which gradually toned down into a forced urbanity as he beheld every eye fixed upon him in amazement, "that circumstances forbid my being of assistance to you in this unfortunate matter. If the paper lies where you say, and I see no other explanation of its loss, I am afraid it will have to remain there for this night at least. The cement in which that door is embedded is thick as any wall; it would take men with pickaxes, possibly with dynamite, to make a breach there wide enough for anyone to reach in. And we are far from any such help."
In the midst of the consternation caused by these words, the clock on the mantel behind his back rang out the hour. It was but a double stroke, but that meant two hours after midnight and had the effect of a knell in the hearts of those most interested.
"But I am expected to give that formula into the hands of our manager before six o'clock in the morning. The steamer sails at a quarter after."
"Can't you reproduce a copy of it from memory?" someone asked; "and insert it in its proper place among the pages you hold there?"
"The paper would not be the same. That would lead to questions and the truth would come out. As the chief value of the process contained in that formula lies in its secrecy, no explanation I could give would relieve me from the suspicions which an acknowledgment of the existence of a third copy, however well hidden, would entail. I should lose my great opportunity."