What Maitland’s reason was for spending the night with the dead body of Darrow, or how he busied himself until morning, I do not know. Perhaps he desired to make sure that everything remained untouched, or, it may be, that he chose this method of preventing Gwen from performing a vigil by the body. I thought this latter view very probable at the time, as I had been singularly impressed with the remarkable foresight my friend had displayed in so quickly and adroitly getting Gwen away from everything connected with her father’s sad and mysterious death.

Arriving at my house my sister took an early opportunity to urge upon Gwen a glass of wine, in which I had placed a generous sedative. The terrible tension soon began to relax, and in less than half an hour she was sleeping quietly. I dreaded the moment when she should awake and the memory of all that had happened should descend like an avalanche upon her. I told my sister that this would be a critical moment, cautioning her to stay by Gwen and to give her, immediately upon her arising, a draught I had prepared for the purpose of somewhat deadening her sensibilities. I arose early, and went to Maitland’s laboratory to collect the things he desired. When I returned Gwen was awake, and to my intense gratification in even a better condition than I had dared to hope.

It was quite late when we reached her house, and Maitland had evidently been at work several hours. He looked sharply at Gwen when she entered, and seemed much pleased at her condition. “You have obeyed my instructions, I see, and slept,” he said, as he gave her his hand. “Yes,” she replied, “I was very tired, and the doctor’s cordial quite overcame me;” and she cast an inquiring glance at the network of white string which Maitland had stretched across the carpet, dividing it into squares like an immense checker-board. In reply to her questioning look, he said: “French detectives are the most thorough in the world, and I am about to make use of their method of instituting an exhaustive search. Each one of the squares formed by these intersecting strings is numbered, and represents one square foot of carpet, the numbers running from one to two hundred and eighty-eight. Every inch of every one of these squares I shall examine under a microscope, and anything found which can be of any possible interest will be carefully preserved, and its exact location accurately marked upon this chart I have prepared, which, as you will see, has the same number of squares as the room, the area of each square being reduced from one square foot to one square inch. You will note that I have already marked the location of all doors, windows, and furniture. The weapon, if there be one, may be very minute, but if it be on the floor we may be assured the microscope will find it. The walls of the room, especially any shelving projections, and the furniture, I shall examine with equal thoroughness, though I have now some additional reasons for believing the weapon is not here.”

“Have you discovered anything new?” Gwen exclaimed, unable to control the excitement caused by this last remark. “You must pardon me,” Maitland rejoined, “if I ask you and the Doctor a question before replying.” She nodded assent, and he continued: “I wish to know if you agree with me that we shall be more likely to arrive at a solution of the problem before us if we keep our own counsel than if we take the officers of the law, or, for that matter, anyone else, into our confidence. You undoubtedly noticed how carefully M. Godin kept his own counsel. Official methods, and the hasty generalisations which form a part thereof—to say nothing of the petty rivalries and the passion for notoriety—can do much to hinder our own work, and, I believe, nothing to help it. What say you?” “That we keep our work to ourselves,” Gwen quickly rejoined, and I signified that I was of the same opinion. “Then,” Maitland continued, “I may say this in answer to your question. I have ascertained something which may bear upon the case in hand. You will remember that part of the gravel for redressing the croquet ground was dumped under the east window there. The painters, I learn, finished painting that side of the house yesterday forenoon before the gravel was removed and placed upon the ground, so that any footprints they may have made in it while about their work were obliterated. As you see, there was loose gravel left under the window to the depth of about two inches. I carefully examined this gravel this morning—there were no footprints.”

I glanced at Gwen; her face had a set expression, and she was deathly pale. “There were, however,” he continued, “places where the gravel had been tamped down as if by the pressure of a rectangular board. I examined these minutely and, by careful measurement and close scrutiny of some peculiar markings suggestive of the grain of wood, satisfied myself that the depressions in the gravel were made by two, and not, as I had at first thought, by one small piece of wood. I found further that these two boards had always borne certain relative relations to each other, and that when one had been turned around the other had undergone a similar rotation. This last is, in my mind, a most important point, for, when coupled with the fact that between any two impressions of the same board the distance was sensibly constant, and was that of a short stride, there could be no reasonable doubt but these boards had been worn upon some person’s feet. They could not have been thrown down merely to be stepped upon, for, in that case, they would not have borne fixed relations to each other—probably would not have been turned end for end at all—and certainly, both would not always have happened to get turned at the same time. I procured a board of the combined area of the two supposed to have made the impressions in the gravel, and weighted it down until, as nearly as I could measure, it impacted the soil to the same extent the others had. The weight was one hundred and thirty-five pounds, which is about right for a man five feet five inches tall. The position of the depressions in the gravel indicated a stride just about right for a man of that height.

“There was one other most important discovery which I made after I had divided the impressions into two classes—according as they were produced by the right or left board—which was that when the right foot was thrown forward the stride was from three to four inches longer than when the left foot led. Directly under the window there was a deep impression in the sand. I took a plaster cast of it, and here it is,” he said, producing an excellent facsimile of a closed hand. “There can be little doubt,” he continued, “from the position occupied by the depression, of which this is a reverse copy, that it was either accidentally made by someone who, stooping before the east window to avoid obstructing its light, suddenly lost his balance and regained his equilibrium by thus thrusting out his hand, or—and this seems far more likely to me—that the hand was deliberately placed in the gravel in order to steady its possessor while he performed some peculiar operation.”

At this point I ventured to ask why he regarded the latter view as so much more tenable than the former. “There are several reasons,” he replied, “which render the view I prefer to take all but certain. First, the impression was made by the left hand. Second, it is the impression of a closed hand, with the upper joints of the fingers undermost. Did you ever know one to save himself from falling by thrusting out a closed hand? Certainly not. There is a certain amount of fear, however slight, invariably associated with losing one’s balance. This sentiment, so far as the hand is concerned, is expressed by opening it and spreading the fingers. This he would instinctively have done, if falling. Then there is the position of the impression relative to the window and some slight testimony upon the sill and glass, for the thorough investigation of which I have been obliged to await my microscope. I have worked diligently, but that is all I have been able to accomplish.”

“All!” exclaimed Gwen, regarding him with ill-concealed admiration. “It seems to me a very great deal. The thoroughness, the minuteness of it all, overwhelms me; but, tell me, have your discoveries led you to any conclusion?” “No,” he replied, “nothing definite yet; I must not allow myself to become wedded to any theory, so long as there is anything further to be learned. If I were to hazard a few idle guesses, I should say your father was murdered in some mysterious way—by a person about five feet five inches tall, weighing, say, one hundred and thirty-five pounds, and having a lame leg, or, perhaps, one limb shorter than the other,—at all events having some deformity or ailment causing a variation in the length of the strides. I should guess also that this person’s feet had some marked peculiarity, since such pains had been taken to conceal the footprints. Then the cast of the hand here encourages speculation. Fingers long, slim, and delicate, save at the nails, where, with the exception of the little finger, are to be found unmistakable signs of the habit of biting the nails,—see, here are the hang-nails,—but, strange to say, the nail of the little finger has been spared, and suffered to grow to an unusual length. I ask myself why this particular nail has been so favoured, and can only answer, ‘because it has some peculiar use.’ It is clear this is not the hand of a manual labourer; the joints are too small, the fingers too delicate, the texture of the skin, which is clearly visible, much too fine—in short, wouldn’t it pass anywhere for a woman’s hand? Say a woman who bit her nails. If it were really such there would be a pair of feminine feet also to be concealed, and boards would do it very nicely—but this is all guesswork, and must not be allowed to affect any subsequent conclusions. If you will excuse me a few minutes I will use the microscope a little on the sill of the east window before we are interrupted by our friends the officers, who will be sure to be here soon.”

While Maitland was thus engaged I did all in my power to distract Gwen’s attention, as much as possible, from her father’s body. Whenever she regarded it, the same intense and set expression overspread her countenance as that which at first had alarmed me. I was glad when Maitland returned from the window and began mixing some of the chemicals I had brought him, for Gwen invariably followed all his movements, as if her very existence depended upon her letting nothing escape her. Maitland, who had asked me for a prescription blank, now dipped it in the chemicals he had mixed and, this accomplished, put the paper in his microscope box to dry.

“I have something here,” he said, “which I desire to photograph quite as much as this room and some of its larger objects,” and he pinned a tiny, crumpled mass against the wall, and made an exposure of it in that condition. “Do you know what this is?” he said, as he carefully smoothed it out for another picture. “I haven’t the slightest idea,” I said. “It is plain enough under the microscope,” he continued, placing it upon the slide, and adjusting the focus. “Would you like to examine it, Miss Darrow?” Gwen had scarcely put her eye to the instrument before she exclaimed: “Why, it’s a piece of thin outside bark from a twig of alder.” Maitland’s face was a study... “Would you mind telling me,” he said deliberately, “how you found that out so quickly?” She hesitated a moment, and then said methodically, pointing toward the water, “I know the alder well—our boat is moored near a clump of them.” “You are a keen observer,” he replied, as he took the prepared paper from his box and spread the film of bark upon it to take a blue print of it. “There is one other object upon the sill which, unfortunately, I cannot take away with me,” he continued, “but shall have to content myself with photographing. I refer to a sinuous line made in the paint, while green, and looking as if a short piece of rope, or, more properly, rubber tubing, since there is no rope-like texture visible, had been dropped upon it, and hastily removed—but see, here are Osborne and Allen looking for all the world as if they were prepared to demonstrate a fourth dimension of space. Now we shall see the suicide theory proved—to their own satisfaction, at least. But, whatever they say, don’t forget we are to keep our own work to ourselves.”

The two officers were alone. M. Godin had apparently decided to work by himself. This did not in the least surprise me, since I could easily see that he had nothing to gain by working with these two officers.

“We’ve solved the matter,” was the first thing Osborne said after passing the time of day. “Indeed?” replied Maitland in a tone which was decidedly ambiguous; “you make it suicide, I suppose?” “That’s just what we make it,” returned the other. “We hadn’t much doubt of it last night, but there were some things, such as the motive, for example, not quite clear to us; but it is all as plain as daylight now.”

“And what says M. Godin?” asked Maitland.

Mr. Osborne burst into a loud guffaw.

“Oho, but that’s good! What says M. Godin? I say, Allen, Maitland wants to know what ‘Frenchy’ says,” and the pair laughed boisterously. “It’s plain enough you don’t know,” he continued, addressing Maitland. “He’s tighter ‘n any champagne bottle you ever saw. The corkscrew ain’t invented that’ll draw a word out of M. Godin. You saw him making notes here last night. Well, the chances are that if this were a murder case, which it isn’t, you’d see no more of M. Godin till he bobbed up some day, perhaps on the other side of the earth, with a pair of twisters on the culprit. He’s a ‘wiz,’ is M. Godin. What does he think? He knows what he thinks, and he’s the only individual on the planet that enjoys that distinction. I say, Allen, do you pump ‘Frenchy’ for the gentleman’s enlightenment,” and again the pair laughed long and heartily.

“Well, then,” said Maitland, “since we can’t have M. Godin’s views we shall have to content ourselves with those of your more confiding selves. Let’s hear all about the suicide theory.”

“I think,” said Osborne in an undertone, “you had better ask Miss Darrow to withdraw for a few moments, as there are some details likely to pain her.” This suggestion was intended only for Maitland, but the officer, used to talking in the open air, spoke so loudly that we all overheard him. “I thank you for your consideration,” Gwen said to him, “but I would much prefer to remain. There can be nothing connected with this matter which I cannot bear to hear, or should not know. Pray proceed.”

Osborne, anxious to narrate his triumph, needed no further urging. “We felt sure,” he began, “that it was a case of suicide, but were perplexed to know why Mr. Darrow should wish to make it appear a murder. Of course, we thought he might wish to spare his daughter the shame such an act would visit upon her, but when this was exchanged for the horrible notoriety of murder, the motive didn’t seem quite sufficient, so we looked for a stronger one—and found it.” “Ah! you are getting interesting,” Maitland observed.

Osborne cast a furtive glance at Gwen, and then continued: “We learned on inquiry that certain recent investments of Mr. Darrow’s had turned out badly. In addition to this he had been dealing somewhat extensively in certain electric and sugar stocks, and when the recent financial crash came, he found himself unable to cover his margins, and was so swept clean of everything. Nor is this all; he had lost a considerable sum of money in yet another way—just how my informant would not disclose—and all of these losses combined made his speedy failure inevitable. Under such conditions many another man has committed suicide, unable to face financial ruin. But this man had a daughter to consider, and, as I have already said, he would wish to spare her the disgrace which the taking of his own life would visit upon her, and, more than all, would desire that she should not be left penniless. The creditors would make away with his estate, and his daughter be left a beggar. We could see but one way of his preventing this, and that was to insure his life in his daughter’s favour. We instituted inquiries at the insurance offices, and found that less than a month ago he had taken out policies in various companies aggregating nearly fifty thousand dollars, whereas, up to that time, he had been carrying only two thousand dollars insurance. Why this sudden and tremendous increase? Clearly to provide for his daughter after his act should have deprived her of his own watchful care. And now we can plainly see why he wished his suicide to pass for murder. He had been insured but a month, and immediate ruin stared him in the face. His death must be consummated at once, and yet, by our law, a man who takes his life before the payment of his second annual insurance premium relieves the company issuing his policy of all liability thereunder, and robs his beneficiary of the fund intended for her. Here, then, is a sufficient motive, and nothing more is required to make the whole case perfectly clear. Of course, it would be a little more complete if we could find the weapon, but even without it, there can be no doubt, in the light of our work, that John Darrow took his own life with the intentions, and for the purposes, I have already set forth.”

“Upon my soul, gentlemen,” exclaimed Maitland, “you have reasoned that out well! Did you carefully read the copies of the various policies when interrogating the companies insuring Mr. Darrow?” “Hardly,” Osborne replied. “We learned from the officials all we needed to know, and didn’t waste any time in gratifying idle curiosity.” A long-drawn “hm-m” was the only reply Maitland vouchsafed to this. “We regret,” said Osborne, addressing Gwen, “that our duty, which has compelled us to establish the truth in this matter, has been the means of depriving you of the insurance money which your father intended for you.” Gwen bowed, and a slight enigmatical smile played for a moment about her lips, but she made no other reply, and, as neither Maitland nor I encouraged conversation, the two officers wished us a good-morning, and left the house without further remark.

“I wish to ask you a few questions,” Maitland said to Gwen as soon as the door had closed behind Osborne and his companion, “and I beg you will remember that in doing so, however personal my inquiries may seem, they have but one object in view—the solution of this mystery.” “I have already had good proof of your singleness of purpose,” she replied. “Only too gladly will I give you any information in my possession. Until this assassin is found, and my father’s good name freed from the obloquy which has been cast upon it, my existence will be but a blank,—yes, worse, it will be an unceasing torment; for I know my father’s spirit—if the dead have power to return to this earth—can never rest with this weight of shame upon it.” As she spoke these words the depth of grief she had hitherto so well concealed became visible for a moment, and her whole frame shook as the expression of her emotion reacted upon her. The next instant she regained her old composure, and said calmly:

“You see I have every reason to shed whatever light I can upon this dark subject.”

“Please, then, to answer my questions methodically, and do not permit yourself to reason why I have asked them. What was your father’s age?”

“Sixty-two.”

“Did he drink?”

“No.”

“Did he play cards?”

“Yes.”

“Poker?”

“Yes, and several other games.”

“Was he as fond of them as of croquet?”

“No; nothing pleased him as croquet did—nothing, unless it were chess.”

“Hum! Do you play chess?”

“Yes; I played a good deal with father.”

“What kind of a game did he play?”

“I do not understand you. He played a good game; my father did not enjoy doing anything that he could not do well.”

“I mean to ask if his positions were steadily sustained—or if, on the other hand, his manoeuvres were swift, and what you might call brilliant.”

“I think you would call them brilliant.”

“Hum! How old are you?”

“Twenty-two.”

“Tell me your relations with your father.”

“We were most constant companions. My mother—she and my father—they were not altogether companionable—in short, they were ill-mated, and, being wise enough to find it out, and having no desire to longer embitter each other’s lives, they agreed to separate when I was only four. They parted without the slightest ill-feeling, and I remained with father. He was very fond of me, and would permit no one else to teach me. At seven I was drawing and painting under his guidance. At eight the violin was put into my hands and my studies in voice began. In the meantime father was most careful not to neglect my physical training; he taught me the use of Indian clubs, and how to walk easily. At eight I could walk four miles an hour without fatigue. The neighbours used to urge that I be put to school, but my father would reply—many a time I have heard him say it—‘a child’s brain is like a flower that blossoms in perceptions and goes to seed in abstractions. Correct concepts are the raw material of reason. Every desk in your school is an intellectual loom which is expected to weave a sound fabric out of rotten raw material. While your children are wasting their fibre in memorising the antique errors of classical thought my child is being fitted to perceive new truths for herself.’ It is needless to say his friends considered these views altogether too radical. But for all that I was never sent to school. My father’s library was always at my disposal, and I was taught how to use it. We were constantly together, and grew so into each other’s lives that “—but her voice failed her, and her eyes moistened. Maitland, though he apparently did not notice her emotion, so busy was he in making notes, quickly put a question which diverted her attention.

“Your father seemed last night to have a presentiment of some impending calamity. Was this a common experience?”

“Of late, yes. He has told me some six or seven times of dreaming the same dreams—a dream in which some assassin struck him out of the darkness.” “Did you at any of these times notice anything which might now lead you to believe this fancied repetition was the result of any mental malady?”

“No.”

“Was his description of the dreams always the same?”

“No; never were they twice alike, save in the one particular of the unseen assassin.”

“Hum!, Did the impression of these dreams remain long with him?”

“He never recovered from it, and each dream only accentuated his assurance that the experience was prophetic. When once I tried to dissuade him from this view, he said to me: ‘Gwen, it is useless; I am making no mistake. When I am gone you will know why I am now so sure—I cannot tell you now, it would only ‘—here he stopped short, and, turning abruptly to me, said with a fierceness entirely alien to his disposition: ‘Hatred is foreign to my nature, but I hate that man with a perfect hell of loathing! Have I been a kind father to you, Gwen? If so, promise me ‘—and he seized me by the wrist—’ promise me if I’m murdered—I may as well say when I’m murdered—you will look upon the man who brings my assassin to justice—the thought that he may escape is damning—as your dearest friend on earth! You will deny him nothing. You will learn later that I have taken care to reward him. My child, you will owe this man a debt you can never repay, for he will have enabled your father’s soul to find repose. I dreamed last night that I came back from the dead, and heard my avenger ask you to be his wife. You refused, and at your ingratitude my restless soul returned to torment everlasting. Swear to me, Gwen, that you’ll deny him nothing, nothing, nothing!’ I promised him, and he seemed much reassured. ‘I am satisfied,’ he said, ‘and now can die in peace, for you are an anomaly, Gwen,—a woman who fully knows the nature of a covenant,’ and he put his arm about me, and drew me to him. His fierceness had subsided as quickly as it had appeared, and he was now all tenderness.”

Maitland, who appeared somewhat agitated by her recital, said to her: “After the exaction of such a promise you have, of course, no doubt that your father was the victim of a mental malady—at least, at such times as those of which you speak?”

Gwen replied deliberately: “Indeed, I have grave doubts. My father was possessed by a strange conviction, but I never saw anything which impressed me as indicating an unsound mind. I am, of course, scarcely fitted to judge in such matters.”

Maitland’s face darkened as he asked: “You would not have me infer that you would consider your promise in any sense binding?”

“And why not?” she ejaculated in astonishment.

“Because,” he continued, “the request is so unnatural as to be in itself sufficient evidence that it was not made by a man in his right mind.”

“I cannot agree with you as to my father’s condition,” Gwen replied firmly; “yet you may be right; I only know that I, at least, was in my right mind, and that I promised. If it cost me my life to keep that pledge, I shall not hesitate a moment. Have you forgotten that my father’s last words were, ‘remember your promise’?” She glanced up at Maitland as she said this, and started a little as she saw the expression of pain upon his face. “I seem to you foolishly deluded,” she said apologetically; “and you are displeased to see that my purpose is not shaken. Think of all my father was to me, and then ask yourself if I could betray his faith. The contemplation of the subject is painful at best; its realisation may, from the standpoint of a sensitive woman, be fraught with unspeakable horror,—I dare not think of it! May we not change the subject?”

For a long time Maitland did not speak, and I forbore to break the silence. At last he said: “Let us hope, if the supposed assassin be taken, the discovery may be made by someone worthy the name of man—someone who will not permit you to sacrifice either yourself or your money.” Gwen glanced at him quickly, for his voice was strangely heavy and inelastic, and an unmistakable gloom had settled upon him. I thought she was a little startled, and I was considering if I had not better call her aside and explain that he was subject to these moods, when he continued, apparently unaware of the impression he had made: “Do you realise how strong a case of suicide the authorities have made out? Like all of their work it has weak places. We must search these in order to overthrow their conclusion. The insurance policies they were ‘too busy’ to read we must peruse. Then, judging from your story, there seems little doubt that your father has left some explanation of affairs hitherto not confided to you—some document which he has reserved for your perusal after his death. No time should be lost in settling this question. The papers may be here, or in the hands of his attorney. Let us search here first.”

“His private papers,” Gwen said, rising to lead the way, “are in his desk in the study.”

“One moment, please,” Maitland interrupted, calling her back, “I have something I have been trying to ask you for the last hour, but have repeatedly put off. I believe your father’s death to have resulted from poisoning. You know the result of the post-mortem inquest. It is necessary to make an analysis of the poison, if there be any, and an absolutely thorough microscopic examination of the wound. I—I regret to pain you—but to do this properly it will be necessary to cut away the wounded portion. Have we your permission to do so?”

For a moment Gwen did not answer. She fell upon her knees before her father’s body, and kissed the cold face passionately. For the first time since the tragedy she found relief in tears. When she arose a great change had come over her. She was very pale and seized a chair for support as she replied to Maitland’s question between the convulsive sobs which she seemed powerless to check: “I—I have bidden him good-bye. We shall but obey his command in sparing no pains to reach the assassin. You—you have my permission to do anything—everything—that may be—necessary to that end. I—I know you will be as gentle—” But she could not finish her sentence. The futility of gentleness—the realisation that her father was forever past all need of tenderness, fell like a shroud about her soul. The awakening I had dreaded had come. Her hand fell from the chair, she staggered, and would have fallen to the floor had not Maitland caught her in his arms.