A fine drizzle was falling the next morning when we rose; and a chill—the first forerunner of winter—was in the air. We had breakfast in the library at half past eight, and at nine o'clock Vance's car, which had been ordered the night before, called for us. We rode down Fifth Avenue, now almost deserted in its thick blanket of yellow fog, and called for Markham at his apartment in West 12th Street. He was waiting for us in front of the house and stepped quickly into the car with scarcely a word of greeting. From his anxious, preoccupied look I knew that he was depending a good deal on what Skeel had to tell him.

    We had turned into West Broadway beneath the Elevated tracks before any of us spoke. Then Markham voiced a doubt which was plainly an articulation of his troubled ruminations.

    "I'm wondering if, after all, this fellow Skeel can have any important information to give us. His phone call was very strange. Yet he spoke confidently enough regarding his knowledge. No dramatics, no request for immunity—just a plain, assured statement that he knew who murdered the Odell girl, and had decided to come clean."

    "It's certain he himself didn't strangle the lady," pronounced Vance. "My theory, as you know, is that he was hiding in the clothes press when the shady business was being enacted; and all along I've clung lovingly to the idea that he was au secret to the entire proceedings. The keyhole of that closet door is on a direct line with the end of the davenport where the lady was strangled; and if a rival was operating at the time of his concealment, it's not unreasonable to assume that he peered forth—eh, what? I questioned him on this point, you remember; and he didn't like it a bit."

    "But, in that case—"

    "Oh, I know. There are all kinds of erudite objections to my wild dream. Why didn't he give the alarm? Why didn't he tell us about it before? Why this? and why that? . . . I make no claim to omniscience, y' know; I don't even pretend to have a logical explanation for the various traits d'union of my vagary. My theory is only sketched in, as it were. But I'm convinced, nevertheless, that the modish Tony knows who killed his bona roba and looted her apartment."

    "But of the three persons who possibly could have got into the Odell apartment that night—namely, Mannix, Cleaver, and Lindquist—Skeel evidently knows only one—Mannix."

    "Yes, to be sure. And Mannix, it would seem, is the only one of the trio who knows Skeel. . . . An interestin' point."

    Heath met us at the Franklin Street entrance to the Criminal Courts Building. He, too, was anxious and subdued and he shook hands with us in a detached manner devoid of his usual heartiness.

    "I've got Snitkin running the elevator," he said, after the briefest of salutations. "Burke's in the hall upstairs, and Emery is with him, waiting to be let into Swacker's office."

    We entered the deserted and almost silent building and rode up to the fourth floor. Markham unlocked his office door and we passed in.

    "Guilfoyle, the man who's tailing Skeel," Heath explained, when we were seated, "is to report by phone to the Homicide Bureau as soon as the Dude leaves his rooms."

    It was now twenty minutes to ten. Five minutes later Swacker arrived. Taking his stenographic notebook, he stationed himself just inside of the swinging door of Markham's private sanctum, where he could hear all that was said without being seen. Markham lit a cigar, and Heath followed suit. Vance was already smoking placidly. He was the calmest person in the room, and lay back languorously in one of the great leather chairs as though immune to all cares and vicissitudes. But I could tell by the overdeliberate way he flicked his ashes into the receiver that he, too, was uneasy.

    Five or six minutes passed in complete silence. Then the sergeant gave a grunt of annoyance. "No, sir," he said, as if completing some unspoken thought, "I can't get a slant on this business. The finding of that jewelry, now, all nicely wrapped up . . . and then the Dude offering to squeal. . . . There's no sense to it."

    "It's tryin', I know, Sergeant; but it's not altogether senseless." Vance was gazing lazily at the ceiling. "The chap who confiscated those baubles didn't have any use for them. He didn't want them, in fact—they worried him abominably."

    The point was too complex for Heath. The previous day's developments had shaken the foundation of all his arguments; and he lapsed again into brooding silence.

    At ten o'clock he rose impatiently and, going to the hall door, looked out. Returning, he compared his watch with the office clock and began pacing restlessly. Markham was attempting to sort some papers on his desk, but presently he pushed them aside with an impatient gesture.

    "He ought to be coming along now," he remarked, with an effort at cheerfulness.

    "He'll come," growled Heath, "or he'll get a free ride." And he continued his pacing.

    A few minutes later he turned abruptly and went out into the hall. We could hear him calling to Snitkin down the elevator shaft, but when he came back into the office, his expression told us that as yet there was no news of Skeel.

    "I'll call up the bureau," he decided, "and see what Guilfoyle had to report. At least we'll know then when the Dude left his house."

    But when the sergeant had been connected with police headquarters, he was informed that Guilfoyle had as yet made no report.

    "That's damn funny," he commented, hanging up the receiver.

    It was now twenty minutes past ten. Markham was growing restive. The tenacity with which the Canary murder case had resisted all his efforts toward a solution had filled him with discouragement; and he had hoped, almost desperately, that this morning's interview with Skeel would clear up the mystery, or at least supply him with information on which definite action could be taken. Now, with Skeel late for this all-important appointment, the strain was becoming tense.

    He pushed back his chair nervously and, going to the window, gazed out into the dark haze of fine rain. When he returned to his desk his face was set.

    "I'll give our friend until half past ten," he said grimly. "If he isn't here then, Sergeant, you'd better call up the local station house and have them send a patrol wagon for him."

    There was another few minutes of silence. Vance lolled in his chair with half-closed eyes, but I noticed that, though he still held his cigarette, he was not smoking. His forehead was puckered by a frown, and he was very quiet. I knew that some unusual problem was occupying him. His lethargy had in it a quality of intentness and concentration.

    As I watched him he suddenly sat up straight, his eyes open and alert. He tossed his dead cigarette into the receiver with a jerky movement that attested to some inner excitation.

    "Oh, my word!" he exclaimed. "It really can't be, y' know! And yet"—his face darkened—"and yet, by Jove, that's it! . . . What an ass I've been—what an unutterable ass! . . . Oh!"

    He sprang to his feet, then stood looking down at the floor like a man dazed, afraid of his own thoughts.

    "Markham, I don't like it—I don't like it at all." He spoke almost as if he were frightened. "I tell you, there's something terrible going on—something uncanny. The thought of it makes my flesh creep. . . . I must be getting old and sentimental," he added, with an effort at lightness; but the look in his eyes belied his tone. "Why didn't I see this thing yesterday? . . . But I let it go on. . . ."

    We were all staring at him in amazement. I had never seen him affected in this way before, and the fact that he was habitually so cynical and aloof, so adamant to emotion and impervious to outside influences, gave his words and actions an impelling and impressive quality.

    After a moment he shook himself slightly, as if to throw off the pall of horror that had descended upon him, and, stepping to Markham's desk, he leaned over, resting on both hands.

    "Don't you see?" he asked. "Skeel's not coming. No use to wait—no use of our having come here in the first place. We have to go to him. He's waiting for us. . . . Come! Get your hat."

    Markham had risen, and Vance took him firmly by the arm.

    "You needn't argue," he persisted. "You'll have to go to him sooner or later. You might as well go now, don't y' know. My word! What a situation!"

    He had led Markham, astonished and but mildly protesting, into the middle of the room, and he now beckoned to Heath with his free hand.

    "You, too, Sergeant. Sorry you had all this trouble. My fault. I should have foreseen this thing. A devilish shame; but my mind was on Monets all yesterday afternoon. . . . You know where Skeel lives?"

    Heath nodded mechanically. He had fallen under the spell of Vance's strange and dynamic importunities.

    "Then, don't wait. And, Sergeant! You'd better bring Burke or Snitkin along. They won't be needed here—nobody'll be needed here any more today."

    Heath looked inquiringly to Markham for counsel; his bewilderment had thrown him into a state of mute indecision. Markham nodded his approval of Vance's suggestions, and, without a word, slipped into his raincoat. A few minutes later the four of us, accompanied by Snitkin, had entered Vance's car and were lurching uptown. Swacker had been sent home; the office had been locked up; and Burke and Emery had departed for the Homicide Bureau to await further instructions.

    Skeel lived in 35th Street, near the East River, in a dingy, but once pretentious, house which formerly had been the residence of some old family of the better class. It now had an air of dilapidation and decay; there was rubbish in the areaway; and a large sign announcing rooms for rent was posted in one of the ground-floor windows.

    As we drew up before it Heath sprang to the street and looked sharply about him. Presently he espied an unkempt man slouching in the doorway of a grocery store diagonally opposite, and beckoned to him. The man shambled over furtively.

    "It's all right, Guilfoyle," the sergeant told him. "We're paying the Dude a social visit. What's the trouble? Why didn't you report?"

    Guilfoyle looked surprised. "I was told to phone in when he left the house, sir. But he ain't left yet. Mallory tailed him home last night round ten o'clock, and I relieved Mallory at nine this morning. The Dude's still inside."

    "Of course he's still inside, Sergeant," said Vance, a bit impatiently.

    "Where's his room situated, Guilfoyle?" asked Heath.

    "Second floor, at the back."

    "Right. We're going in. Stand by."

    "Look out for him," admonished Guilfoyle. "He's got a gat."

    Heath took the lead up the worn steps which led from the pavement to the little vestibule. Without ringing, he roughly grasped the doorknob and shook it. The door was unlocked, and we stepped into the stuffy lower hallway.

    A bedraggled woman of about forty, in a disreputable dressing gown, and with hair hanging in strings over her shoulders, emerged suddenly from a rear door and came toward us unsteadily, her bleary eyes focused on us with menacing resentment.

    "Say!" she burst out, in a rasping voice. "What do youse mean by bustin' in like this on a respectable lady?" And she launched forth upon a stream of profane epithets.

    Heath, who was nearest her, placed his large hand over her face, and gave her a gentle but firm shove backward.

    "You keep outa this, Cleopatra!" he advised her, and began to ascend the stairs.

    The second-floor hallway was dimly lighted by a small flickering gas jet, and at the rear we could distinguish the outlines of a single door set in the middle of the wall.

    "That'll be Mr. Skeel's abode," observed Heath.

    He walked up to it and, dropping one hand in his right coat pocket, turned the knob. But the door was locked. He then knocked violently upon it and, placing his ear to the jamb, listened. Snitkin stood directly behind him, his hand also in his pocket. The rest of us remained a little in the rear.

    Heath had knocked a second time when Vance's voice spoke up from the semidarkness. "I say, Sergeant, you're wasting time with all that formality."

    "I guess you're right," came the answer after a moment of what seemed unbearable silence.

    Heath bent down and looked at the lock. Then he took some instrument from his pocket and inserted it into the keyhole.

    "You're right," he repeated. "The key's gone."

    He stepped back and, balancing on his toes like a sprinter, sent his shoulders crashing against the panel directly over the knob. But the lock held.

    "Come on, Snitkin," he ordered.

    The two detectives hurled themselves against the door. At the third onslaught there was a splintering of wood and a tearing of the lock's bolt through the molding. The door swung drunkenly inward.

    The room was in almost complete darkness. We all hesitated on the threshold, while Snitkin crossed warily to one of the windows and sent the shade clattering up. The yellow-gray light filtered in, and the objects of the room at once took definable form. A large, old-fashioned bed projected from the wall on the right.

    "Look!" cried Snitkin, pointing; and something in his voice sent a shiver over me.

    We pressed forward. On the foot of the bed, at the side toward the door, sprawled the crumpled body of Skeel. Like the Canary, he had been strangled. His head hung back over the footboard, his face a hideous distortion. His arms were outstretched, and one leg trailed over the edge of the mattress, resting on the floor.

    "Thuggee," murmured Vance. "Lindquist mentioned it. Curious!"

    Heath stood staring fixedly at the body, his shoulders hunched. His normal ruddiness of complexion was gone, and he seemed like a man hypnotized.

    "Mother o' God!" he breathed, awestricken. And, with an involuntary motion, he crossed himself.

    Markham was shaken also. He set his jaw rigidly.

    "You're right, Vance." His voice was strained and unnatural. "Something sinister and terrible has been going on here. . . . There's a fiend loose in this town—a werewolf."

    "I wouldn't say that, old man." Vance regarded the murdered Skeel critically. "No, I wouldn't say that. Not a werewolf. Just a desperate human being. A man of extremes, perhaps, but quite rational, and logical—oh, how deuced logical!"