try to puzzle this thing out."

CHAPTER IV

What had become of Herbert Whitmore?

Like a thief in the night he had slipped out of his Fifth Avenue home, disappeared from his business, vanished like a specter, while the domestic tragedy of the Collinses paused in anticipation of his reappearance.

Beard, the confidential secretary, had taken possession of his employer's office, and to all inquiries regarding Whitmore's absence, made the same reply:

"He is gone indefinitely on a business trip."

Not even the persistent Collins was able to elicit anything additional. No further information was vouchsafed Mrs. Collins, who had taken up her abode with her brother; the financially troubled Ward, desperately fighting off ruin, could learn nothing from the silent, inscrutable Beard.

Then, one morning, unostentatiously as he had disappeared, Whitmore returned to his office. He wore a new spring coat, a new soft hat, new gloves and shoes, an unfamiliar brown tie against a striped shirt-bosom, as if he had just stepped out of a haberdasher's shop.

Down the long aisle, between the two rows of desks he passed, nodding with that air of pleasant kindliness that had endeared him to his hundreds of employés.

"Good morning, Mr. Whitmore—glad to see you back!" was fired at him with respectful familiarity from a score of clerks.

He smiled amiably, replying occasionally with a cheery rejoinder. Evidently he was in excellent spirits.

Whitmore's private office, at the rear of the long hall, ran the full width of the room. It was partitioned off from the main room by a glass partition through which he was at all times visible to his employés. The office contained no windows, being shut in on three sides by the thick walls of the building, and obtained its light through the glass paneling of the partition. The floor was covered by a green carpet and three or four chairs rested against the wall.

"Sam!" the merchant called to his office boy. "I shall be very busy with my papers this morning. Permit no one to enter my office and don't bring any visitors' cards."

Whitmore placed his hand affectionately on the boy's touseled hair.

"Don't forget my instructions!" he said pleasantly.

The merchant permitted the glass door of his office to remain open. Divesting himself of his coat he dropped into the revolving chair at his desk and swung around so as to sit with his back toward the outer office.

Behind the transparent partition he worked, sorting papers and slipping them into pigeon-holes. Toward noon one of the clerks observed that the merchant had slipped down into his chair, that his head hung strangely to one side.

"What's the matter with Mr. Whitmore?" the clerk asked the office boy.

The two thrust their faces against the intervening glass, noting that the employer's limbs were rigidly outstretched and that one hand hung limply at his side while the other rested on the desk.

They tiptoed into the office, like guilty schoolboys bent on eavesdropping. A single glance at Whitmore's white face and they burst through the door, their faces distorted with terror.

"Something's happened to Mr. Whitmore!" shouted the clerk.

Drummond, the head clerk, leaped forward in a quick offer of assistance. He remained a minute or two in the private office, then emerged, haggard, with eyes staring.

"Mr. Whitmore's been shot!" burst from his lips. "Get a policeman. He's dead," he added with a sob.

The news seemed to strike the office dumb. The clerks regarded each other like bewildered sheep, awed, terrified, a vague fear gripping their hearts. In the midst of their furious, living activity, the specter of death had suddenly appeared. It had crept in on them silently, stealthily, selecting the most shining mark as its victim. Unannounced, it had proclaimed the frailty of human life more effectively than if it had revealed itself in a lightning bolt. With noiseless, unseen hands, it had abducted the most beloved figure among them, deprived them forever of the kindly, fatherly personality of the man whom they had come to regard more as a friend than an employer.

Recovering from their first terror, the clerks left their desks and massed forward toward the partition, but the head clerk waved them back.

"Everyone remain in his place until after the police have arrived," he ordered.

The office boy, who had gone to summon a policeman, now returned with the bluecoat. The latter examined the dead man an instant, then, following the usual custom, summoned an ambulance and notified the coroner.

"Looks like a suicide," he declared over the telephone.

The ambulance was the first to arrive and the young surgeon, after listening vainly for a promising flutter of the heart, officially pronounced the merchant dead. When the coroner arrived, he was assured that nothing in the private office had been disturbed, after which he proceeded with his investigation.

Almost the first object which he noticed was a shiny revolver lying on the desk, about an inch from the dead man's fingers. As he lifted the weapon, he observed that the merchant had been shot in the side, and, turning toward the policeman, said:

"A plain case of suicide."

More as a matter of form, rather than with any hope of discovering anything of value, the coroner opened the revolver, and, as he did so, an exclamation of surprise escaped his lips. His eyes fixed themselves on the loaded chambers of the barrel in a puzzled stare until he was convinced that his senses were not deceiving him.

The revolver was fully loaded. It had never been fired.

Switching on the electric lights, the coroner examined the clothing of the victim. There were no powder marks where the bullet had entered.

"Officer, this is murder!" he exclaimed excitedly. "Notify the detective bureau. And don't permit anyone to leave this building."

CHAPTER V

While awaiting the arrival of the Headquarters men, the coroner busied himself with a preliminary examination of the clerks. The coroner was a small, fussy individual, smooth-shaven, with reddish-brown hair brushed back in pompadour fashion. Because of his small stature and insignificant appearance he was compelled to adopt a brisk air of command, lest witnesses presume to trifle with his authority.

"Gentlemen, I am Coroner Hart," he announced, stepping into the outer office and addressing the assembled clerks. "I shall immediately begin a preliminary inquest and you will all regard yourselves summoned as witnesses. The policeman will permit no one to leave the room without my permission."

The clerks, unfamiliar with the legal proceedings attached to a homicide case, exchanged puzzled glances. In the presence of their beloved dead, this man's unsympathetic attitude seemed almost a profanation. The policeman, in passing through the office on his way to the door, had let drop the remark that murder had been committed, yet none of the employés could bring himself to believe that an alien hand had fired the mortal bullet. No visitor had entered Whitmore's office; none of the clerks had been within. Who could have done it?

The coroner called one of the clerks who had sat within a dozen feet of the door all morning.

"Did you see anyone enter the office?" he asked.

"No, sir," the clerk replied.

"Could anyone have entered without passing you or without your noticing him?"

"Absolutely not."

"Did you hear the shot fired?"

"I didn't hear a sound after Mr. Whitmore entered the office."

"And your hearing—is it good?"

"Perfect."

After putting the same questions to half a dozen other clerks and obtaining similar answers, Coroner Hart decided to save time by addressing himself to the employés in general.

"If anyone saw any person enter that office this morning or heard a shot, let him come