Isobel came into the room and approached the chair from which I had arisen. In her plain morning frock, with the sun bringing out those wonderful russet tints in her hair, but having that frightened look still in her eyes, she had never seemed more beautiful. Yet I saw as I rose to greet her that she was laboring under the influence of dangerous nervous excitement.  
"You are worried about Eric?" I said, when we had exchanged those rather formal greetings in which I think we took mutual shelter. Certainly I did, and later I was to know that Isobel did so, too.
 
"Every day seems to make the case grow blacker against him," she replied, sinking down upon the settee beside me.
 
And indeed the shadow which had fallen upon all of us seemed at that moment almost palpable—a thing to be felt like the darkness of Egypt and not to be dispelled even by the brightness of the morning.
 
"When did you last see Coverly?"
 
Isobel raised her head wearily.
 
"Last night, and he seemed to think that some one was following him—a detective."
 
I noticed that Isobel spoke of Eric Coverly with a certain manner of restraint for which I could not account. Yet perhaps it was only natural that she should do so, but at the time I was foolishly blind to the opposing emotions which fought and conflicted within her.
 
"He still refused to explain his movements on the night of the murder?" I asked.
 
"Yes, he persisted in his extraordinary silence," said Isobel.
 
The look of trouble in her eyes grew more acute.
 
"What I cannot understand is a sort of attitude of resentment which he has lately adopted."
 
"Of resentment? Towards whom?"
 
"Towards me."
 
"But—"
 
"Oh, it's quite incomprehensible, Jack, and it is making me horribly unhappy. He complained so bitterly too about this police surveillance to which he is subjected. He realizes that the coroner is almost certain to put a wrong construction on his silence, but instead of being frank about it he adopts, even when alone with me, this incomprehensible attitude of resentment. In fact his behavior almost suggests that I am responsible for his present misfortunes."
 
"He must be mad," I said, and I expect I spoke bitterly, for Isobel lowered her eyes and her face flushed with embarrassment.
 
"Don't think that I condemn him," I added hastily, "but really in justice to you, if not in order to clear his own good name, he should speak out at once. Are you expecting to see him to-day?"
 
Isobel nodded.
 
"I am expecting him at almost any moment," she replied; then glancing aside at a number of daily papers which lay littered upon the floor beside the settee: "Of course you have seen what the press has to say about it?" she added.
 
I nodded.
 
"What can you expect?" said I. "It is one of those cases in which practically all the evidence, although it is of a purely circumstantial nature, points to an innocent man as the culprit. I feel very keenly annoyed with Coverly, for not only is he involving both of you in a most unsavory case but he is also hindering the work of justice. In fact by his inexplicable silence he is, although no doubt unconsciously, affording the murderer time to elude the law."
 
Even as I spoke the words I heard a cab draw up in the street below, and glancing out of the window, I saw Coverly alight from the cab, pay the man and enter the doorway. His bearing was oddly furtive, that, as I thought with a sudden pang, of a fugitive. A few moments later he came into the room and his expression when he found me there was one of marked hostility.
 
Eric Coverly bore no resemblance whatever to the deceased baronet from whom he inherited the title, belonging as he did to quite another branch of the family. Whereas Sir Marcus had been of a dark and sallow type, Eric Coverly was one of those fair, fresh-colored, open-air English types, handsome in an undistinguished way, and as a rule of a light and careless disposition. There had never been any very close sympathy between us, for the studies to which I devoted so much time were by him regarded as frankly laughable absurdities. Although well enough informed, he was typical of his class, and no one could justly have catalogued him as an intellectual.
 
"Good morning, Addison," he said, having greeted Isobel in a perfunctory fashion which I assumed to be accounted for by my unwelcome presence. "The men of your Fleet Street tribe have conspired to hang me, I see."
 
"Don't talk nonsense, Coverly," I said bruskly; "this misapprehension is bound to arise if you decline to give any account of your movements."
 
"But it is an outrage!" cried Coverly hotly. "What the devil do I know about Marcus's death?"
 
"I am perfectly convinced that you know nothing whatever; but then I have known you for many years. The 'Fleet Street tribe' to whom you refer merely regard you as a unit of our rather large population. In a case of this kind, Coverly, all men are equal."
 
Whilst I had been delivering myself of this somewhat priggish speech—designed, I may add, in self-defense, to spur Coverly to a rejoinder which might throw some light upon the mystery—he had regarded me with an expression of ever increasing dislike. I noted that there were shadows under his eyes, and that he was in a highly nervous and excited condition. He had slept but little I judged during the last forty-eight hours and had possibly had recourse to stimulants to enable him to face the new trials which arose with every day.
 
"I don't feel called upon," he said angrily, "to give an account of my movements to every policeman who cares to inquire. I know nothing whatever about the matter. I have said so, and I am not accustomed to have my word doubted."
 
"My dear Coverly," said I, "you must be perfectly well aware that sooner or later you will have to relinquish this heroic pose. Will you allow no one to advise you? You will have to answer the coroner, and if you persist in this extraordinary refusal to give a simple answer to a simple question, surely you realize that the matter will be transferred to a higher tribunal?"
 
"Oh, I told you that they had hanged me in Fleet Street already, Isobel!" cried Coverly, with a burst of unmirthful laughter.
 
But (and no man could have construed the thing favorably to Coverly) to my anger and amazement he added:
 
"Let them do it! I'll speak if I choose, but not otherwise!"
 
That I was annoyed with the young fool already, my remarks to him, which had transgressed every code of good taste, must sufficiently have shown. But I had hoped to provoke him to a declaration which would clear his name from the shadow which was settling darkly upon it, and which would raise that shadow from the girl who stood beside him, watching me with a sort of reproachful look in her dark eyes.
 
Now I recognized that I could remain no longer and keep the peace, therefore:
 
"Perhaps it is time that I went about my own business," I said, conjuring up a smile, although it must have been a dreary one, "and ceased to interfere with the affairs of other people. Good-by, Isobel. Anythi............