The Greatest Works of R. Austin Freeman: 80+ Titles in One Volume (Illustrated Edition). R. Austin Freeman
commenced, with the utmost deliberation, to turn out its contents on to the table. These included a laced handkerchief, a purse, a card-case, a visiting list, a packet of papier poudré, and when she had laid the last-mentioned article on the table, she paused abruptly and gazed into Miss Gibson's face with the air of one who has made a startling discovery.
"I remember the woman's name," she said in an impressive voice. "It was Gudge—Mrs. Gudge, the sister-in-law of—"
Here Miss Gibson made an unceremonious dive into the open bag and fished out a tiny parcel wrapped in notepaper and secured with a silk thread.
"Thank you," said Thorndyke, taking it from her hand just as Mrs. Hornby was reaching out to intercept it. He cut the thread and drew from its wrappings a little book bound in red cloth, with the word "Thumbograph" stamped upon the cover, and was beginning to inspect it when Mrs. Hornby rose and stood beside him.
"That," said she, as she opened the book at the first page, "is the thumb-mark of a Miss Colley. She is no connection of ours. You see it is a little smeared—she said Reuben jogged her elbow, but I don't think he did; at any rate he assured me he did not, and, you know—"
"Ah! Here is one we are looking for," interrupted Thorndyke, who had been turning the leaves of the book regardless of Mrs. Hornby's rambling comments; "a very good impression, too, considering the rather rough method of producing it."
He reached out for the reading lens that hung from its nail above the mantelpiece, and I could tell by the eagerness with which he peered through it at the thumb-print that he was looking for something. A moment later I felt sure that he had found that something which he had sought, for, though he replaced the lens upon its nail with a quiet and composed air and made no remark, there was a sparkle of the eye and a scarcely perceptible flush of suppressed excitement and triumph which I had begun to recognise beneath the impassive mask that he presented to the world.
"I shall ask you to leave this little book with me, Mrs. Hornby," he said, breaking in upon that lady's inconsequent babblings, "and, as I may possibly put it in evidence, it would be a wise precaution for you and Miss Gibson to sign your names—as small as possible—on the page which bears Mr. Reuben's thumb-mark. That will anticipate any suggestion that the book has been tampered with after leaving your hands."
"It would be a great impertinence for anyone to make any such suggestion," Mrs. Hornby began; but on Thorndyke's placing his fountain pen in her hand, she wrote her signature in the place indicated and handed the pen to Miss Gibson, who signed underneath.
"And now," said Thorndyke, "we will take an enlarged photograph of this page with the thumb-mark; not that it is necessary that it should be done now, as you are leaving the book in my possession; but the photograph will be wanted, and as my man is expecting us and has the apparatus ready, we may as well despatch the business at once."
To this both the ladies readily agreed (being, in fact, devoured by curiosity with regard to my colleague's premises), and we accordingly proceeded to invade the set of rooms on the floor above, over which the ingenious Polton was accustomed to reign in solitary grandeur.
It was my first visit to these mysterious regions, and I looked about me with as much curiosity as did the two ladies. The first room that we entered was apparently the workshop, for it contained a small woodworker's bench, a lathe, a bench for metal work and a number of mechanical appliances which I was not then able to examine; but I noticed that the entire place presented to the eye a most unworkmanlike neatness, a circumstance that did not escape Thorndyke's observation, for his face relaxed into a grim smile as his eye travelled over the bare benches and the clean-swept floor.
From this room we entered the laboratory, a large apartment, one side of which was given up to chemical research, as was shown by the shelves of reagents that covered the wall, and the flasks, retorts and other apparatus that were arranged on the bench, like ornaments on a drawing-room mantelpiece. On the opposite side of the room was a large, massively-constructed copying camera, the front of which, carrying the lens, was fixed, and an easel or copyholder travelled on parallel guides towards, or away, from it, on a long stand.
This apparatus Thorndyke proceeded to explain to our visitors while Polton was fixing the "Thumbograph" in a holder attached to the easel.
"You see," he said, in answer to a question from Miss Gibson, "I have a good deal to do with signatures, cheques and disputed documents of various kinds. Now a skilled eye, aided by a pocket-lens, can make out very minute details on a cheque or bank-note; but it is not possible to lend one's skilled eye to a judge or juryman, so that it is often very convenient to be able to hand them a photograph in which the magnification is already done, which they can compare with the original. Small things, when magnified, develop quite unexpected characters; for instance, you have handled a good many postage stamps, I suppose, but have you ever noticed the little white spots in the upper corner of a penny stamp, or even the difference in the foliage on the two sides of the wreath?"
Miss Gibson admitted that she had not.
"Very few people have, I suppose, excepting stamp-collectors," continued Thorndyke; "but now just glance at this and you will find these unnoticed details forced upon your attention." As he spoke, he handed her a photograph, which he had taken from a drawer, showing a penny stamp enlarged to a length of eight inches.
While the ladies were marvelling over this production, Polton proceeded with his work. The "Thumbograph" having been fixed in position, the light from a powerful incandescent gas lamp, fitted with a parabolic reflector, was concentrated on it, and the camera racked out to its proper distance.
"What are those figures intended to show?" inquired Miss Gibson, indicating the graduation on the side of one of the guides.
"They show the amount of magnification or reduction," Thorndyke explained. "When the pointer is opposite 0, the photograph is the same size as the object photographed; when it points to, say, × 4, the photograph will be four times the width and length of the object, while if it should point to, say, ÷ 4, the photograph will be one-fourth the length of the object. It is now, you see, pointing to × 8, so the photograph will be eight times the diameter of the original thumb-mark."
By this time Polton had brought the camera to an accurate focus and, when we had all been gratified by a glimpse of the enlarged image on the focussing screen, we withdrew to a smaller room which was devoted to bacteriology and microscopical research, while the exposure was made and the plate developed. Here, after an interval, we were joined by Polton, who bore with infinite tenderness the dripping negative on which could be seen the grotesque transparency of a colossal thumb-mark.
This Thorndyke scrutinised eagerly, and having pronounced it satisfactory, informed Mrs. Hornby that the object of her visit was attained, and thanked her for the trouble she had taken.
"I am very glad we came," said Miss Gibson to me, as a little later we walked slowly up Mitre Court in the wake of Mrs. Hornby and Thorndyke; "and I am glad to have seen these wonderful instruments, too. It has made me realise that something is being done and that Dr. Thorndyke really has some object in view. It has really encouraged me immensely."
"And very properly so," I replied. "I, too, although I really know nothing of what my colleague is doing, feel very strongly that he would not take all this trouble and give up so much valuable time if he had not some very definite purpose and some substantial reasons for taking a hopeful view."
"Thank you for saying that," she rejoined warmly; "and you will let me have a crumb of comfort when you can, won't you?" She looked in my face so wistfully as she made this appeal that I was quite moved; and, indeed, I am not sure that my state of mind at that moment did not fully justify my colleague's reticence towards me.
However, I, fortunately, had nothing to tell, and so, when we emerged into Fleet Street to find Mrs. Hornby already ensconced in a hansom, I could only promise, as I grasped the hand that she offered to me, to see her again at the earliest opportunity—a promise which my inner consciousness assured me would be strictly fulfilled.
"You seem to be on quite confidential terms with our fair friend," Thorndyke remarked, as we strolled