a curious row of indentations, extending in a semi-circular line about midway of one of the longer edges of the envelope.
The marks were very faint, but by turning the letter about in the light, Mrs. Morton at last managed to make them out. What they were, how they had been placed there Duvall could not say. Yet their presence indicated something of value, of that he felt sure.
"I don't understand them at all," Mrs. Morton replied, returning the letter to him. "It looks as though someone had held the letter in a—a pair of pincers."
The suggestion conveyed by her words interested Duvall greatly. The same thought had been forming in his own mind.
He rose to his feet, his eyes shining with interest. Why could not such a pair of pincers or forceps have been attached to a long pole, such as a fishing rod, and the letter in this way pushed through the window and released by pulling on a cord attached to one of the forceps' handles? The thing was perfectly practical, except for the fact that there seemed no place from which such a pole or rod might have been extended. He gazed out of the library window, across the court to the row of dormer windows in the house opposite. The distance from the nearest of them, to Ruth's window was, as he had before observed, at least twenty feet horizontally, or some twenty-three feet on the diagonal. Then there was the distance from the window to the dressing table, at least eight feet more, to be added, making necessary a rod over thirty feet long. And he saw at a glance that even could a rod of this length be secured and handled, the angle made by a line from the dormer window through Ruth's window was such that the end of the rod or pole would strike the floor only a few feet beyond the windowsill, and in no possible way could its further end be elevated sufficiently to deposit the letter in front of the dressing table. The thing was manifestly out of the question, even had the window of the girl's room been wide open. And Mrs. Morton had assured him with the greatest positiveness that it had been open, at the time the letter was found, but a few inches. He returned the letters to his pocket and rose.
"The thing is astonishing—remarkable," he said to Mrs. Morton, who was regarding him intently. "I confess that so far I am quite in the dark. I feel sure that whoever entered the room, or left the message, must have done so by means of the fire-escape, and yet, how was it possible, without marks having been left upon the paint? I think I shall make another and even more careful examination, in the hope that some slight clues may have escaped me." He once more made his way toward the girl's room, followed by Mrs. Morton.
The room was precisely as they had left it. The window facing to the rear was wide open, Duvall having omitted to close it after his examination of the fire escape. The window fronting on the court was raised perhaps six inches. And yet, to the utter amazement of them both, there lay on the floor of the room, near its center, a square white envelope, addressed in typewriting to Ruth Morton.
Duvall sprang forward and seized it with an exclamation of astonishment. It bore the same seal, in the same black wax, and upon it was the same semi-circular row of indentations. He tore the letter open. Its typewritten message was brief but significant. "Only twenty-seven days more," it read. The grinning death's head seal seemed to Duvall's astonished eyes even more terrifying than before.
With a bound he reached the rear window, and swung himself upon the fire escape. There was no one in sight. The gray surface of the ironwork showed not the slightest scratch, save those made by his own heels earlier in the day. The steps of the ladder leading up to the next floor were glistening, immaculate. Those of the one to the floor below were equally so. He re-entered the room, and going to the opposite window, threw it wide open. The three dormer windows of the adjoining house were gray, dusty, as though they had not been opened for years. He turned to his companion with a look of amazement.
"In all my experience, Mrs. Morton," he said, "I do not think that I have ever encountered anything quite so astonishing. That letter must have been placed there while I was in the apartment above. Your cook, your maid, are out. Certainly you did not place it there yourself. And yet we know that someone has been in this room, or at least delivered the letter, during the past fifteen minutes. Had I not found it here myself, I should have been almost tempted to disbelieve it, but I am forced to admit its truth."
Mrs. Morton stood wringing her hands.
"It—it seems almost supernatural," she exclaimed. "Poor Ruth. What are we to do?"
"There is nothing supernatural about the matter, madam," Duvall remarked. "I don't doubt the explanation is simple enough, could we but hit upon it. But so far I confess I am unable to understand it." He went over to the wall which adjoined that of the house next door, and sounded it, inch by inch, with a small hammer he took from his bag of tools. The operation required several minutes. When he had completed it, he tossed the hammer back into his kit in disgust. "Brick, of course," he said, "and perfectly solid." He turned toward the door. "What are you going to do now?" Mrs. Morton asked.
"Try to find out something through this telegram. And also, investigate the house next door."
"But, you will come back? I am afraid."
"I shall be at your call at all times, Mrs. Morton. If anything of interest occurs, notify me here." He drew a card from his pocket and wrote upon it the name of his hotel. "Say nothing to your daughter about these new threats. I shall probably see you again later in the day." Shouldering his kit of tools, Duvall left the apartment. He was by no means satisfied with the results of his visit. In fact there had apparently been no results at all.
Chapter 5
Duvall's first move, after leaving Mrs. Morton's apartment that morning, was to enter the taxicab which had been waiting for him at the door and return to his hotel. A light overcoat which he had in the vehicle concealed his workman's disguise sufficiently to enable him to reach his room without exciting comment. Once there, he changed his clothes, putting on a professional looking frock coat, and adjusting a pair of shell-rimmed eyeglasses to complete the slight disguise. Thus equipped, he once more set out.
Grace had left a note for him, saying that she had gone shopping. Beside it lay the photograph of Ruth Morton, which he had, he remembered, left on his chiffonier while putting on his workman's clothes that morning. At the foot of her hastily written note Grace had added a postscript. "Is this the reason for your sudden interest in motion pictures?" it read. "Well, I'll admit she's a raving beauty, Richard, but I'll bet she isn't half as nice as I am." Duvall read the note with a smile. Grace was always such a thoroughly good comrade.
Leaving the hotel, he went to the telegraph office from which the message to Ruth Morton had been delivered that morning. It was on Columbus Avenue, some four blocks from the Mortons' apartment.
"Can you tell me where this telegram was sent from?" he asked. The message showed that it had been filed, as well as delivered, within the city limits.
The man behind the desk looked up his records.
"It was sent from the main office on lower Broadway, at 8.30," he said, briefly.
Duvall thanked him, then turned away. Although he realized that he could scarcely hope to obtain even a scanty description of the sender of the telegram from the main office, he determined to go there. First, however, he walked back toward the Mortons' apartment, and going up the steps of the brownstone house adjoining, rang the doorbell.
A neat maid-servant opened the door. Duvall favored her with a smile, at the same time taking a notebook and pencil from his pocket.
"I
