"Naturally I was a little surprised," she remarked falteringly, "that I should have appeared just in time to interrupt a discussion of the singular happenings in my home last night; but really--"
"This bracelet," interrupted the little scientist again. "It was of oval form, perhaps, with no stones set in it, or anything of that sort-merely a band that fastened with an invisible hinge. That's right, I believe?"
"Quite right, yes," replied the girl readily.
It occurred to Hatch suddenly that he himself did not know-in fact, had not inquired-the shape of the bracelet. He knew only that it was gold, and of no great value. Knowing nothing about what it looked like, he had not described it to The Thinking Machine; therefore he raised his eyes inquiringly now. The drawn face of the scientist was inscrutable.
"As I started to say," the girl went on, "the bracelet and the events of last night have no direct connection with the purpose of my visit here."
"Indeed?" commented the scientist.
"No; I came to see if you could assist me in another way. For instance," and she fumbled in her pocket book, "I happened to know, Professor Van Dusen, of some of the remarkable things you have accomplished, and I should like to ask if you can throw any light on this for me."
She drew from the pocketbook a crumpled, yellow sheet of paper-a strip perhaps an inch wide, thin as tissue, glazed, and extraordinarily wrinkled. The Thinking Machine squinted at its manifold irregularities for an instant curiously, nodded, sniffed at it, then slowly began to unfold it, smoothing it out carefully as he went. Hatch leaned forward eagerly and stared. He was a little more than astonished at the end to find that the sheet was blank. The Thinking Machine examined both sides of the paper thoughtfully.
"And where did you find the bracelet at last?" he inquired casually.
"I have reason to believe," the girl rushed on suddenly, regardless of the question, "that this strip of paper has been substituted for one of real value,-I may say one of great value,-and I don't know how to proceed, unless--"
"Where did you find the bracelet?" demanded The Thinking Machine again impatiently.
Hatch would have hesitated a long time before he would have said the girl was disconcerted at the question, or that there had been any real change in the expression of her pretty face. And yet--
"After the masked woman had gone," she went on calmly, "I summoned the servants and we made a search. We found the bracelet at last. I thought I had tossed it into my jewel box when I removed it last night; but it seems I was careless enough to let it fall down behind my dressing table, and it was there all the time the-the masked woman was in my room."
"And when did you make this discovery?" asked The Thinking Machine.
"Within a few minutes after she went out."
"In making your search, you were guided, perhaps, by a belief that in the natural course of events the bracelet could not have disappeared from your jewel box unless some one had entered the room before the masked woman entered; and further that if anyone had entered you would have been awakened?"
"Precisely." There was another pause. "And now please," she went on, "what does this blank strip of paper mean?"
"You had expected something with writing on it, of course?"
"That's just what I had expected," and she laughed nervously. "You may rest assured I was considerably surprised at finding that."
"I can imagine you were," remarked the scientist dryly.
The conversation had reached a point where Hatch was hopelessly lost. The young woman and the scientist were talking with mutual understanding of things that seemed to have no connection with anything that had gone before. What was the paper anyway? Where did it come from? What connection did it have with the affairs of the previous night? How did--
"Mr. Hatch, a match, please," requested The Thinking Machine.
Wonderingly the reporter produced one and handed it over. The imperturbable man of science lighted it and thrust the mysterious paper into the blaze. The girl arose with a sudden, startled cry, and snatched at the paper desperately, extinguishing the match as she did so. The Thinking Machine turned disapproving eyes on her.
"I thought you were going to burn it!" she gasped.
"There is not the slightest danger of that, Miss Harding," declared The Thinking Machine coldly. He examined the blank sheet again. "This way, please."
He arose and led the way into his tiny laboratory across the narrow hall, with the girl following. Hatch trailed behind, wondering vaguely what it was all about. A small brazier flashed into flame as The Thinking Machine applied a match, and curious eyes peered over his shoulders as he held the blank strip, now smoothed out, so that the rising heat would strike it.
For a long time three pairs of eyes were fastened on the mysterious paper, all with understanding now, but nothing appeared. Hatch glanced round at the young woman. Her face wore an expression of tense excitement. The red lips were slightly parted in anticipation, the eyes sparkling, and the cheeks flushed deeply. In staring at her the reporter forgot for the instant everything else, until suddenly:
"There! There! Do you see?"
The exclamation burst from her triumphantly, as faint, scrawly lines grew on the strip suspended over the brazier. Totally oblivious of their presence apparently, The Thinking Machine was squinting steadily at the paper, which was slowly crinkling up into wavy lines under the influence of the heat. Gradually the edges were charring, and the odor of scorched paper filled the room. Still the scientist held the paper over the fire. Just as it seemed inevitable that it would burst into flame, he withdrew it and turned to the girl.
"There was no substitution," he remarked tersely. "It is sympathetic ink."
"What does it say?" demanded the young woman abruptly. "What does it mean?"
The Thinking Machine spread the scorched strip of paper on the table before them carefully, and for a long time studied it minutely.
"Really, my dear young woman, I don't know," he said crabbedly at last. "It may take days to find out what it means."
"But something's written there! Read it!" the girl insisted.
"Read it for yourself," said the scientist impatiently. "I am frank to say it's beyond me as it is now. No, don't touch it. It will crumble to pieces."
Faintly, yet decipherable under a magnifying glass, the three were able to make out this on the paper:
Stonehedge-idim-serpa'l ed serueh siort tnaeG ed eteT al rap eetej erbmo'l ed tniop ud zerit sruO'd rehcoR ud eueuq ud dron ua sdeip tnec. W.F.H.
"What does it mean? What does it mean?" demanded the young woman impatiently. "What does it mean?"
The sudden hardening of her tone caused both Hatch and The Thinking Machine to turn and stare at her. Some strange change had come over her face. There was chagrin, perhaps, and there was more than that,-a merciless glitter in the brown eyes, a grim expression about the chin and mouth, a greedy closing and unclosing of the small, well shaped hands.
"I presume it's a cipher of some sort," remarked The Thinking Machine curtly. "It may take time to read it and to learn definitely just where the treasure is hidden, and you may have to wait for--"
"Treasure!" exclaimed the girl. "Did you say treasure? There is treasure, then?"
The Thinking Machine shrugged his shoulders. "What else?" he asked. "Now, please, let me see the bracelet."
"The bracelet!" the girl repeated, and again Hatch noted that quick change of expression on the pretty face. "I-er-must you see it? I-er--" And she stopped.
"It is absolutely necessary, if I make anything of this," and the scientist indicated the charred paper. "You have it in your pocketbook, of course."
The girl stepped forward suddenly and leaned over the laboratory table, intently studying the mysterious strip of paper. At last she raised her head as if she had reached a decision.
"I have only a-a part of the bracelet," she announced, "only half. It was unavoidably broken, and--"
"Only half?" interrupted The Thinking Machine, and he squinted coldly into the young woman's eyes.
"Here it is," she said at last, desperately almost. "I don't know where the other half is; it would be useless to ask me."
She drew an aged, badly scratched half circlet of gold from her pocketbook, handed it to the scientist, then went and looked out the window. He examined it-the delicate decorative tracings, then the invisible hinge where the bracelet had been rudely torn apart. Twice he raised his squint eyes and stared at the girl as she stood silhouetted against the light of the window. When he spoke again there was a deeper note in his voice-a singular softening, an unusual deference.
"I shall read the cipher of course, Miss Harding," he said slowly. "It may take an hour, or it may take a week, I don't know." Again he scrutinized the charred paper. "Do you speak French?" he inquired suddenly.