Next Craig produced the results of his morning’s work, which consisted of several dozen sheets of white paper, carefully separated into three bundles. These he also laid down in long lines on the floor, each package in a separate line. Then I began to realise what he was doing, and became fascinated in watching him on his hands and knees eagerly scanning the papers and comparing them with the photographs. At last he gathered up two of the sets of papers very decisively and threw them away. Then he shifted the third set a bit, and laid it closely parallel to the photographs.
“Look at these, Walter,” he said. “Now take this deep and sharp indentation. Well, there’s a corresponding one in the photograph. So you can pick them out one for another. Now here’s one missing altogether on the paper. So it is in the photograph.”
Almost like a schoolboy in his glee, he was comparing the little round circles made by the metal insertions in an “anti-skid” automobile tire. Time and again I had seen imprints like that left in the dust and grease of an asphalted street or the mud of a road. It had never occurred to me that they might be used in any way. Yet here Craig was, calmly tracing out the similarity before my very eyes, identifying the marks made in the photograph with the prints left on the bits of paper.
As I followed him, I had a most curious feeling of admiration for his genius. “Craig,” I cried, “that’s the thumb-print of an automobile.”
“There speaks the yellow journalist,” he answered merrily. “‘Thumb Print System Applied to Motor Cars’—I can see the Sunday feature story you have in your mind with that headline already. Yes, Walter, that’s precisely what this is. The Berlin police have used it a number of times with the most startling results.”
“But, Craig,” I exclaimed suddenly, “the paper prints, where did you get them? What machine is it?”
“It’s one not very far from here,” he answered sententiously, and I saw he would say nothing more that might fix a false suspicion on anyone. Still, my curiosity was so great that if there had been an opportunity I certainly should have tried out his plan on all the cars in the Fletcher garage.
Kennedy would say nothing more, and we ate our luncheon in silence. Fletcher, who had decided to lunch with the Greenes, called Kennedy up on the telephone to tell him it would be all right for him to call on Miss Bond later in the afternoon.
“And I may bring over the apparatus I once described to you to determine just what her nervous condition is?” he asked. Apparently the answer was yes, for Kennedy hung up the receiver with a satisfied, “Good-bye.”
“Walter, I want you to come along with me this afternoon as my assistant. Remember I’m now Dr. Kennedy, the nerve specialist, and you are Dr. Jameson, my colleague, and we are to be in consultation on a most important case.”
“Do you think that’s fair?” I asked hotly, “to take that girl off her guard, to insinuate yourself into her confidence as a medical adviser, and worm out of her some kind of fact incriminating someone? I suppose that’s your plan, and I don’t like the ethics, or rather the lack of ethics, of the thing.”
“Now think a minute, Walter. Perhaps I am wrong; I don’t know. Certainly I feel that the end will justify the means. I have an idea that I can get from Miss Bond the only clue that I need, one that will lead straight to the criminal. Who knows? I have a suspicion that the thing I’m going to do is the highest form of your so-called ethics. If what Fletcher tells us is true that girl is going insane over this thing. Why should she be so shocked over the death of an uncle she did not live with? I tell you she knows something about this case that it is necessary for us to know, too. If she doesn’t tell someone, it will eat her mind out. I’ll add a dinner to the box of cigars we have already bet on this case that what I’m going to do is for the best—for her best.”
Again I yielded, for I was coming to have more and more faith in the old Kennedy I had seen made over into a first-class detective, and together we started for the Greenes’, Craig carrying something in one of those long black handbags which physicians use.
Fletcher met us on the driveway. He seemed to be very much affected, for his face was drawn, and he shifted from one position to another nervously, from which we inferred that Miss Bond was feeling worse. It was late afternoon, almost verging on twilight, as he led us through the reception-hall and thence onto a long porch overlooking the bay and redolent with honeysuckle.
Miss Bond was half reclining in a wicker chair us we entered. She started to rise to greet us, but Fletcher gently restrained her, saying, as he introduced us, that he guessed the doctors would pardon any informality from an invalid.
Fletcher was a pretty fine fellow, and I had come to like him; but I soon found myself wondering what he had ever done to deserve winning such a girl as Helen Bond. She was what I should describe as the ideal type of “new” woman,—tall and athletic, yet without any affectation of mannishness. The very first thought that struck me was the incongruousness of a girl of her type suffering from an attack of “nerves,” and I felt sure it must be as Craig had said, that she was concealing a secret that was having a terrible effect on her. A casual glance might not have betrayed the true state of her feelings, for her dark hair and large brown eyes and the tan of many suns on her face and arms betokened anything but the neurasthenic. One felt instinctively that she was, with all her athletic grace, primarily a womanly woman.
The sun sinking toward the hills across the bay softened the brown of her skin and, as I observed by watching her closely, served partially to conceal the nervousness which was wholly unnatural in a girl of such poise. When she smiled there was a false note in it; it was forced and it was sufficiently evident to me that she was going through a mental hell of conflicting emotions that would have killed a woman of less self-control.
I felt that I would like to be in Fletcher’s shoes—doubly so when, at Kennedy’s request, he withdrew, leaving me to witness the torture of a woman of such fine sensibilities, already hunted remorselessly by her own thoughts.
Still, I will give Kennedy credit for a tactfulness that I didn’t know the old fellow possessed. He carried through the preliminary questions very well for a pseudo-doctor, appealing to me as his assistant on inconsequential things that enabled me to “save my face” perfectly. When he came to the critical moment of opening the black bag, he made a very appropriate and easy remark about not having brought any sharp shiny instruments or nasty black drugs.
“All I wish to do, Miss Bond, is to make a few, simple little tests of your nervous condition. One of them we specialists call reaction time, and another is a test of heart action. Neither is of any seriousness at all, so I beg of you not to become excited, for the chief value consists in having the patient perfectly quiet and normal. After they are over I think I’ll know whether to prescribe absolute rest or a visit to Newport.”
She smiled languidly, as he adjusted a long, tightly fitting rubber glove on her shapely forearm and then encased it in a larger, absolutely inflexible covering of leather. Between the rubber glove and the leather covering was a liquid communicating by a glass tube with a sort of dial. Craig had often explained to me how the pressure of the blood was registered most minutely on the dial, showing the varied emotions as keenly as if you had taken a peep into the very mind of the subject. I think the experimental psychologists called the thing a “plethysmograph.”
Then he had an apparatus which measured association time. The essential part of this instrument was the operation of a very delicate stop-watch, and this duty was given to me. It was nothing more nor less than measuring the time that elapsed between his questions to her and her answers, while he recorded the actual questions and answers and noted the results which I worked out. Neither of us was unfamiliar