It was no part of Detective Clancy’s business to pry into the private affairs of Senator Meiklejohn. Senators are awkward fish to handle, being somewhat similar to whales caught in nets designed to capture mackerel. But the Bureau is no respecter of persons. Men much higher up in politics and finance than William Meiklejohn would be disagreeably surprised if they could read certain details entered opposite their names in the dossiers kept by the police department. Still, it behooved Clancy to tread warily.

As it happened, he was just the man for this self-imposed duty. Two Celtic strains mingled in his blood, while American birth and training had not only quickened his intelligence but imparted a quality of wide-eyed shrewdness to a daring initiative. When he and the bluff Steingall worked together the malefactor on whose heels they pressed had a woeful time. As one blood-stained rascal put it in a bitter moment before the electric chair claimed him for the expiation of his last and worst crime:

“Them two guys give a reg’lar fellow no chanst. When they’re trailin’ you every road leads straight to Sing Sing. The big guy has a punch like Jess Willard, an’ the lil ’un a nose like a Montana wolf.”

It was Clancy’s nose for the more subtle elements in crime which brought him to the small chÂlet on the private pier at the foot of Eighty-sixth Street that night. He could not guess what game he might flush, but he was keen as a bloodhound in the chase.

Meanwhile, Senator Meiklejohn encountered Ronald Tower the moment he re-entered the palatial club. By this time he seemed to have regained his customary air of geniality, being one of those rather uncommon men whose apparent characteristics are never so marked as when they are acting a part.

“H’lo, Ronnie,” he cried affably, “I met Helen as she left for the theater. She has an inquiring mind, but I headed her off. By the way, will you be at this luncheon to-morrow?”

“Not I,” laughed Tower. “I’m barred. She says I have no head for business, and some deep-laid plan for filling the family coffers is in hand.”

The Senator obviously disliked these outspoken references to money-making. He squirmed, but smiled as though Tower had made an excellent joke.

“Try and get the ukase lifted,” he urged. “I want you to be there.”

“Nothing doing,” and the other grinned. “Helen says I resemble you in everything but brain power, Senator. I’m a good-looker as a husband, but a poor mutt in Wall Street.”

They laughed at the conceit. The two men were curiously alike in face and figure, though a close observer like Clancy would have classed them as opposite as the poles in character and temperament. Meiklejohn’s features were cast in the stronger mold. They showed lines which Ronald Tower’s placid existence would never produce. The Senator was suave, too. He seldom pressed a point to the limit.

“Helen’s good opinion is doubly flattering,” he said. “She is a bright woman, and knows how to command her friends.”

Tower glanced at a clock in the hall.

“Time we were off,” he announced. “Come with me. I’m taking Johnny Bell, I think.”

“Sorry. I have an important letter to write. But I’ll join before the crowd cuts in.”

The Senator hurried up-stairs. He must take the journey alone, and snatch an opportunity to attend that mysterious rendezvous while the Sans Souci’s gig was ferrying some of the bridge-players to the yacht.

Owing to a slight misunderstanding Tower missed the other man, and traveled alone in his car. On that trivial circumstance hinged events which not only affected many lives but disturbed New York society more than any other incident within a decade.

Few among the thousands of summer promenaders who enjoy the magnificent panorama of the North River from the wooded heights of the Drive know of the pier at Eighty-sixth Street. For one thing, the clubhouse itself is an unpretentious structure; for another, the narrow and winding stairway leading down the side of the cliff gives no indication of its specific purpose. Moreover, a light foot-bridge across the tracks is hardly noticeable through the screen of trees and shrubs above, and the water-front lies yet fifty yards farther on.

At night the approach is not well lighted. In fact, no portion of the beautiful and precipitous riparian park is more secluded than the short stretch between the landing-stage and the busy thoroughfare on the crest.

That evening, as has been seen, Mr. Van Hofen was taking no risks for himself or his guests. A patrolman from the local precinct was stationed at the iron-barred gate on the landward end of the foot-bridge.

Clancy, on descending from the bus, stood for a few seconds and surveyed the scene. The night was dark and the sky overcast, but the myriad lights on the New Jersey shore were reflected in the swift current of the Hudson. The superb Sans Souci was easily distinguishable. All her ports were a-glow; lamps twinkled beneath the awnings on her after deck, and a boarding light indicated the lowered gangway.

The yacht was moored about three hundred feet from the landing-stage. Her graceful outlines were clearly discernible against the black, moving plain of the river. Just in that spot shone her radiance, lending a sense of opulence and security. For the rest, that part of New York’s great waterway was dim and impalpable.

Try as he might, the detective could see no small craft afloat. The yacht’s gig, waiting at the clubhouse, was hidden from view. He sped rapidly down the steps, and found the patrolman.

“That you, Nolan?” he said.

The man peered at him.

“Oh, Mr. Clancy, is it?” he replied.

“You know Senator Meiklejohn by sight?”

“Sure I do.”

“When he comes along hail him. Say ‘Good evening, Senator.’ I’ll hear you.”

Clancy promptly moved off along the path which runs parallel with the railway. Nolan, though puzzled, put no questions, being well aware he would be told nothing more.

Three gentlemen came down the cliff, and crossed the bridge. One was Van Hofen himself. Now, the fates had willed that Ronald Tower should come next, and alone. He was hurrying. He had seen figures entering the club, and wanted to join them in the gig.

The policeman made the same mistake as many others.

“Good evenin’, Senator,” he said.

Tower nodded and laughed. He had no time to correct the harmless blunder. Even so, he was too late for the boat, which was already well away from the stage when he reached it. He lighted a cigarette, and strolled along the narrow terrace between river and lawn.

Clancy, on receiving his cue, followed Tower. An attendant challenged him at the iron gate, but Nolan certified that this diminutive stranger was “all right.”

It was on the tip of the detective’s tongue to ask if Mr. Meiklejohn had gone into the clubhouse when he saw, as he imagined, the Senator’s tall form silhouetted against the vague carpet of the river; so he passed on, and this minor incident contributed its quota to a tragic occurrence. He heard some one behind him on the bridge, but paid no heed, his wits being bent on noting anything that took place in the semi-obscurity of the river’s edge.

Meanwhile, the patrolman, encountering a double of Senator Meiklejohn, was dumbfounded momentarily. He sought enlightenment from the attendant.

“An’, for the love of Mike, who was the first wan?” he demanded, when assured that the latest arrival was really the Senator.

“Mr. Ronald Tower,” said the man. “They’re like as two peas in a pod, ain’t they?”

Nolan muttered something. He, too, crossed the bridge, meaning to find Clancy and explain his error. Thus, the four men were not widely separated, but Tower led by half a minute—long enough, in fact, to be at the north end of the terrace before Meiklejohn passed the gate.

There, greatly to his surprise, he looked down into a small motor-boat, with two occupants, keeping close to the sloping wall. The craft and its crew could have no reasonable business there. They suggested something sinister and furtive. The engine was stopped, and one of the men, huddled up in the bows, was holding the boat against the pull of the tide by using a boathook as a punting pole.

Tower, though good-natured and unsuspicious, was naturally puzzled by this apparition. He bent forward to examine it more definitely, and rested his hands on a low railing. Then he was seen by those below.

“That you?” growled the second man, standing up suddenly.

“It is,” said Tower, speaking with strict accuracy, and marveling now who on earth could have arranged a meeting at such a place and in such bizarre conditions.

“Well, here I am,” came the gruff announcement. “The cops are after me. Some one must have tipped them off. If it was you I’ll get to know and even things up, P. D. Q. Chew on that during the night’s festivities, I advise you. Brought that wad?”

Tower was the last man breathing to handle this queer situation discreetly. He ought to have temporized, but he loathed anything in the nature of vulgar or criminal intrigue. Being quick-tempered withal, if deliberately insulted, he resented this fellow’s crude speech.

“No,” he cried hotly. “What you really want is a policeman, and there’s one close at hand—Hi! Officer!” he shouted: “Come here at once. There are two rascals in a boat—”

Something swirled through the darkness, and his next word was choked in a cry of mortal fear, for a lasso had fallen on his shoulders and was drawn taut. Before he could as much as lift his hands he was dragged bodily over the railing and headlong into the river.

Clancy, forced by circumstances to remain at a distance, could only overhear Tower’s share in the brief conversation. The tones in the voice perplexed him, but the preconcerted element in the affair seemed to offer proof positive that Senator Meiklejohn had kept his appointment. He was just in time to see Tower’s legs disappearing, and a loud splash told what had happened. He was not armed. He never carried a revolver unless the quest of the hour threatened danger or called for a display of force. In a word, he was utterly powerless.

Senator Meiklejohn, alive to the vital fact that some one on the terrace had discovered the boat, hung back dismayed. He was joined by Nolan, who could not understand the sudden commotion.

“What’s up?” Nolan asked. “Didn’t some wan shout?”

Clancy, in all his experience of crime and criminals, had never before encountered such an amazing combination of unforeseen conditions. The boat’s motor was already chugging breathlessly, and the small craft was curving out into the gloom. He saw a man hauling in a rope from the stern, and well did he know why the cord seemed to be attached to a heavy weight. Not far away he made out the yacht’s gig returning to the stage.

“Sans Souci ahoy!” he almost screamed. “Head off that launch! There’s murder done!”

It was a hopeless effort, of course, though the sailors obeyed instantly, and bent to their oars. Soon they, too, vanished in the murk, but, finding they were completely outpaced, came back seeking for instructions which could not be given. The detective thought he was bewitched when he ran into Senator Meiklejohn, pallid and trembling, standing on the terrace with Nolan.

“You?” he shrieked in a shrill falsetto. “Then, in heaven’s name, who is the man who has just been pulled into the river?”

“Tower!” gasped the Senator. “Mr. Ronald Tower. They mistook him for me.”

“Faith, an’ I did that same,” muttered the patrolman, whose slow-moving wits could assimilate only one thing at a time.

Clancy, afire with rage and a sense of inexplicable failure, realized that Meiklejohn’s admission and its now compulsory explanation could wait a calmer moment. The club attendant, attracted by the hubbub, raced to the lawn, and the detective tackled him.

“Isn’t there a motor launch on the yacht?” he asked.

“Yes, sir, but it’ll be all sheeted up on deck.”

“Have you a megaphone?”

“Yes.”

The man ran and grabbed the instrument from its hook, so Clancy bellowed the alarming news to Mr. Van Hofen and the others already on board the Sans Souci that Ronald Tower had been dragged into the river and probably murdered. But what could they do? The speedy rescue of Tower, dead or alive, was simply impossible.

The gig arrived. Clancy stormed by telephone at a police station-house and at the up-river station of the harbor police, but such vain efforts were the mere necessities of officialdom. None knew better than he that an extraordinary crime had been carried through under his very eyes, yet its daring perpetrators had escaped, and he could supply no description of their appearance to the men who would watch the neighboring ferries and wharves.

Van Hofen and his friends, startled and grieved, came ashore in the gig, and Clancy was striving to give them some account of the tragedy without revealing its inner significance when his roving glance missed Meiklejohn from the distraught group of men.

“Where is the Senator?” he cried, turning on the gaping Nolan.

“Gee, he’s knocked out,” said the policeman. “He axed me to tell you he’d gone down-town. Ye see, some wan has to find Mrs. Tower.”

Clancy’s black eyes glittered with fury, yet he spoke no word. A blank silence fell on the rest. They had not thought of the bereaved wife, but Meiklejohn had remembered. That was kind of him. The Senator always did the right thing. And how he must be suffering! The Towers were his closest friends!