Inside the house the atmosphere of danger reached Garth more positively than it had done even through Brown's unreasoning terror. Alsop and Marvin met them in the hall. Both were white-faced and nervous. Through the open door of a library Garth saw five men in evening clothes gathered about a table which was littered with papers. Alsop closed the door.

"I hope you and the inspector are satisfied," he jeered. "We're properly trapped."

"The house is surrounded by detectives," Garth said. "We've arranged to take care of the one with the bomb. For there is a bomb, Mr. Alsop. There's no point lying about that."

Alsop scarcely made an effort to hide his fear.

"How are your detectives outside going to help us in here?"

He pointed to the closed door of the library.

"All my figures, all of my plans that I've ever put on paper I've brought out here for the first time to-night for this conference. Don't you suppose those devils know? And that thing—you can laugh at me if you like—I tell you that thing in white is after them. When I went upstairs just now to bring them from the safe I felt it. I saw something white, and I ran down. Ask Marvin. I'm afraid. I acknowledge it. Stay in this house with that—that influence, then if you'll tell me I'm a coward I'll believe it."

"I'm not sneering," Garth said grimly. "As a matter of fact we know your veiled woman is actually to be in this house at nine o'clock. It's likely enough she's upstairs now in some hidden corner after failing to steal your papers. I'll search every rat hole, because you can take it for granted her apparent magic is pure trickery, and if she isn't to be found upstairs we've a net arranged down here for her a little later."

He explained briefly the arrangement that Nora's presence and her disguise had made possible. Alsop and Marvin were not impressed.

"Better find out what you can now," Alsop advised.

He nodded at Marvin. Garth and Nora followed the secretary towards the stairs. Suddenly, with a sharp intake of breath, Garth turned, grasped Nora's arm, and drew her back.

"Alsop," he whispered excitedly, "I don't give a hang how long you've had your servants, or how much you trust them. The thing's obvious anyway. Nora! You saw that?"

Nora nodded. Her eyes were wide.

"What do you mean?" Alsop gasped.

Without answering Garth ran down the hallway and flung the curtain at the end to one side. Across a wide dining-room he saw a woman, slender and middle-aged. Her attitude was of flight. Her hand rested on the knob of the farther door. As Garth called sharply for Alsop she opened the door and went through. Alsop had only a glimpse.

"It's my housekeeper," he said. "She's worked here for twenty years. Certainly there's nothing wrong there."

"I wonder." Nora spoke softly. "Such people are clever enough to involve one's own family against one. She can't leave the house anyway. Suppose, Jim, we look upstairs."

While Alsop, angry and at a loss, went back to the library, Garth and Nora climbed to the upper hall. Garth supposed that Marvin would have made a light for them, but of all the doors that opened from the stair landing one alone was wide, and no light gleamed through that.

"Marvin!" he called, and again: "Marvin! Marvin!"

He was aware of Nora's shivering. He glanced at her. The color had left her cheeks.

"Something's wrong up here, Jim," she said. "I know it. I feel it. Don't you feel anything strange? You heard him come up, and after what Mr. Alsop said—where is he? Why doesn't he answer?"

Garth stepped forward. Nora reached out and grasped his arms. The quality of her voice startled him.

"Don't go in there without a light, Jim."

He shook off her hands. He entered the dark room, and immediately he knew she had been right, that he had advanced too precipitately. He stumbled against something soft and yielding, and went down, stretching out his hand to save himself. He knew what his fingers had found. He snatched them away with a little cry:

"Get back to the hall, Nora!"

But he heard no movement from her, so, since he didn't dare wait, he took his flashlight from his pocket, pressed the control, and turned the ray on the features his hand had touched in the dark. Marvin was stretched, face downward on the floor near the head of the bed. His arm lay beyond his head, pitiful evidence that he had reached for the electric light switch which had been just beyond his grasp.

Nora with a reluctant air had come closer. Crying out her horror, she indicated the collar, at the back of Marvin's neck.

"Blood!"

Garth nodded.

"Like Brown. The same place as Brown's wound."

Nora covered her face with her hands.

Garth sprang up, unconsciously quoting Brown's words:

"That's madness!"

He ran to the bathroom and brought water with which he bathed Marvin's face and head. He looked up after a moment with a sigh of relief.

"It was only a glancing blow," he said. "He'll come around."

Marvin, indeed, before long stirred, and tried to struggle to a sitting posture as Brown had done. He cried out, as Brown had cried:

"The veiled woman!"

"You see," Nora breathed.

Garth lifted the secretary to the bed, but when, to an extent, the man had recovered consciousness he had nothing reasonable to tell.

He had started, he said, up the stairs, thinking Garth at his heels. He had been about to press the switch.

"I knew she was there," he sobbed. "I saw her—all white, and with a veil over her face. Then I don't know. I don't remember being struck. Everything went black."

Garth with a gesture of determination turned and commenced examining the room. Nora, crouched against the wall, watched him with the assurance of one who sees an evil prophecy fulfilled. After a quarter of an hour he gave it up. There was no one concealed in the room. Nor, he would have sworn, was there any reasonable hiding place. From behind the screen where the veiled woman had evidently disappeared twice there was no possible escape.

"Before long, Marvin," he muttered, "I'll be as bad as you and old Alsop. If you believe in ghosts, Nora, this certainly looks like one."

He glanced at his watch.

"Are you still anxious to try that plan of yours after what you've seen?"

She nodded. She went uncertainly from the room. Marvin stumbled after them. They helped him down the stairs and to a sofa in the lower hall. Garth led Nora to the west door.

"We've less than ten minutes," he said, "and I don't understand. I'd rather you kept out of it."

In silence and with determination she slipped on the white gown she had brought and draped the white veil over her face. Garth, shaking his head, arranged a screen just within the doorway. He turned out the electric lamp, lighted a single candle, and placed it on a stand at some distance.

"Wait behind the screen," he said. "Actually, Nora, unless we are dealing with something beyond the human, the result is certain. I shall be at the other end of the hall just within the library door. Anybody coming from the interior of the house must pass me. I'll grab the woman. I'll see she makes no outcry. I'll keep her out of the way for she must be human to that extent. When you hear the two raps open the door and take the bomb. According to Alsop's description you won't be suspected in this light. A little over five minutes! I'll get Alsop and his crew out of the library and where their precious skins will be safe."

He touched her hand in farewell. Her fingers were very cold. She shivered and slipped behind the screen. He went to the library, knocked, entered, and closed the door. The faces that greeted him were restless with misgiving.

"I want you all out of this room now, please," Garth said. "I've delayed moving you as long as I dared, so, if anything goes wrong, those outside won't know you have left. Take them to the back part of the house, Mr. Alsop. Into the cellar, if you like. It's safest. In fifteen or twenty minutes I hope you will be able to resume your conference in perfect security."

Without words the men gathered up their papers and filed out.

Garth, left alone in the room, turned out the light, went to the window, slipped behind the curtain, opened the casement, and peered through.

The darkness was still unrelieved. Through that darkness, he knew, men crept on an errand of fanaticism and death. Through that silence he was momentarily expectant of the audible evidence of their approach. But he could hear nothing, see nothing. He couldn't wait. It was necessary for him to go to the door from behind which he was to ambush the veiled woman in order that Nora might take her place.

As he thrust the curtain aside a thin, tinkling sound stole from the silence of the room. He felt his way to the telephone and lifted the receiver.

"Hello!" he whispered. "Hello!"

The inspector's hoarse voice came to him, lowered to a note of caution.

"You, Garth? I'm in the gardener's cottage. Tell me Alsop and his people are safe."

"Yes," Garth said. "Hurry! Hurry! What's up?"

"For Heaven's sake, be careful," the inspector answered, "because, Garth, all your dope was right. There are four of them in the grounds now, and one carries a thing that looks like a bomb. Are you going to get away with it? The veiled woman—"

"She's in the house," Garth murmured. "I'm waiting. I must go. Hush! I hear—"

He broke off. Through the appalling quietness of the house he had heard distinctly from the direction of the west door two sharp raps. He flashed his light at the clock over the mantel. Its hands pointed exactly to nine o'clock. Yet he had seen no one pass the dim frame of the library doorway—nothing white.

He ran through. In the wan candle light he could see the slender figure in the white gown and the flowing veil slip from behind the screen and open the door. Then Nora would get the bomb, but where was the real veiled woman? What unaccountable intuition had warned her away?

Garth slipped along the hall, clinging to the shadow of a tapestry. He knew from the black patch at the end of the corridor that the door was wide. In that dark patch he suddenly saw the silhouette of a man. The hands were stretched out as if to meet the hands which Nora appeared to offer for the bomb. But the man carried no bomb. In the dim light Garth thought at first that he carried nothing. Then he understood his mistake, and he cried out, drawing his own revolver, darting forward:

"Nora! Look out!"

He had seen that the man's fingers fondled an automatic, raised it, aimed it at the confident, expectant figure.

"For police spies!" the man called.

Before Garth could reach the door the harsh, tearing report of the automatic came, and was repeated twice. There was no question. At that short range each sound from the stubby cylinder was the voice of death. Garth saw the form that he loved sway, clutch at nothing, without a cry crumple and lie motionless across the threshold.

Before the other could turn his gun on him the detective had grappled with the murderer. He bore him to the porch floor and struck him across the temple with the butt of his revolver. Garth arose then, and, scarcely aware of what he did, placed his police whistle at his lips, and blew shrilly through the night.

While he waited for the help that he knew would be too late for Nora or for him, he gazed at the silent, slender form. The veil alone moved, trembling from time to time in the wind which came gently from the woods. That reached the candle also, which flickered, making the light ghastly, unbearable.

Garth shook. He covered his face with his hands, for the dim, unreal illumination had shown him that the figure was no longer completely white. The reason for its stillness exposed a scarlet testimony.

That which Garth had feared but had forgotten in the rush of his more personal terror rent the silence with a chaotic turmoil. A terrific detonation was followed by the shattering of glass. Shouts and curses arose from the house. Someone hurried across the drive and up the steps. Garth was aware of a heavy hand on his shoulder. He glanced up at the inspector's startled face. Suddenly the detective realized that the old man had no misgivings for Nora. At this moment, with the white form at his feet, he must picture her quietly, safely at home. Garth moved away, but the inspector grasped him again.

"What's the matter with you? You've let them use their infernal bomb. You're responsible for Alsop and his people."

"They're safe," Garth answered.

The candle still burned. In its wan and flickering light he indicated the still, white figure.

"The veiled woman!" the inspector said. "Dead!"

He stooped swiftly.

"You've done well here anyway, Garth. Let's have a look."

Frantically Garth snatched at his arm and tried to pull him away.

"Don't look! Not you!"

The inspector glanced up amazed. Garth knelt with a gesture of despair.

"What's that?" the inspector whispered, and his voice was suddenly afraid. Garth followed his glance. From the black shadows of the woods a white figure glided. Its face was hidden beneath a white cloth.

Garth's shaking fingers reached out and lifted the stained veil from the silent form. He drew back. His cry was like a sob. For a long time the inspector and Garth stared at the features, apprehensive even in death, of the secretary, Marvin.

Nora, who ran up the steps crying out her fear for those in the house, gave Garth no opportunity for questions or for the expression of that relief which shook him with a power nearly physical. Even the inspector, after his first shock of surprise, had no time to demand the particulars of her share in the night's work.

The four prisoners were brought to the hall. They knew they must stand trial for Brown's death as well as for this attempt. The one who had shot Marvin and who had gone down before Garth's attack was still dazed. Garth identified him as the man who had disguised himself as an Oriental in the shop. The sharp face of the Levantine twitched with hatred and fright. The other two, although he knew the type, the detective had never seen before. They boasted openly that the shop had been only an outpost for this affair. Through a dictaphone and the telegraphy of the pipe, instructions had been sent to and from their headquarters. To-night, they declared, the shop had ceased to be useful. No trail would lead from it to the central force that worked in New York.

As they drove home in a taxicab the inspector bitterly lamented the fact to Garth and Nora.

"We'll get to it later," Garth said.

"If only things hadn't gone wrong at the last minute!" Nora cried. "If only I might have taken the bomb and talked to the man who brought it! Even with the others! For it's clear those fellows will give nothing away now. We can blame poor Marvin that I never had a chance."

"What do you mean?" Garth asked. "You haven't told us what happened when I left you by the west door."

"You remember we had got Marvin on a sofa in the hall," Nora answered. "He must have seen you close the door when you went in the library to warn Alsop and the others, because from my hiding place I saw him get up, and, with no appearance of an injured man, sneak along the wall to the stairs. I followed him up, and, Jim, I found him on the floor in his room again, but this time he didn't hear me, and he was talking. Then I saw his whole game. There was a dictaphone hidden beneath the bed with which he had probably communicated with those outside the house for days. We had stopped him the first time when he had just learned of my intended masquerade. Don't you see? He had to tell them that. We caught him, and he scratched himself to throw us off the track with the details of another case like Brown's. Now I heard him tell everything—just what I was to do, and that Alsop and the others were in the library. I ran downstairs, but when I reached the lower hall I saw him coming after me. So I said I had changed my mind, that I was afraid, that I wanted only to leave the house. I went to the kitchen and slipped out, intending to get to you, Jim, with my information. But I knew these men were in the grounds, and I had to go carefully. When I crept up to the library window I thought I saw you. Then the telephone bell rang, and I couldn't make you hear."

"Of course," Garth said, "Marvin, coming down, had seen that the library door was open, and that there was no longer a light there. It was too late to use the dictaphone again, but he knew he must change his instructions and tell them not to waste the bomb in the library. So he threw on his disguise and rushed to the west door as he had originally planned, in too much of a hurry to dream such a mistake could happen. I suppose he got past while I was at the window."

"Marvin," the inspector mused, "was just the man for them. Probably full of wild-eyed ideas, and feeling a divine call to help smash Alsop. I hold no brief for that millionaire. I understand he had to work, like most everybody else, for what he's got, and maybe that's the reason he can't understand these new social notions. And far be it from me to say anything about Marvin's grand thoughts, although it may be his share in this affair was made worth his while. My part in life is to see that the law's kept, and I guess without the law there wouldn't be anything much worth while for anybody to fight over. These rough boys had certainly fixed Marvin to help them break the law into little bits of pieces. So maybe he deserves just what he got. Alsop tells me he didn't trust any of his employÉs with his schemes for putting a stop to socialistic movements in his concerns, and that's where the big hitch came. Marvin, whenever he knew there were private papers in the house, was always searching. He had a key to Alsop's door. He used that old ghost story, and dressed himself up in case any of the servants should see him. Their fright would give him time to cover himself. When Alsop did catch him he came across with the terrible experiences he had had himself with the veiled woman. Ought to have got on to him before."

"It wasn't easy to suspect him," Nora said, "particularly after we had seen the housekeeper's curiosity, and had found him, apparently unconscious, in his room. He was really too frightened at the flat, and we might have suspected when Jim heard those directions at the shop. Such luck as that doesn't often happen. It's easily explained now. The time it took you, Jim, to go to the hospital and to visit the shop was just the time he needed to return to Wall Street with Mr. Alsop, make some excuse, and get into the shop by a back way to receive his new orders. It was simple enough."

The inspector grunted.

"If we saw all the simple things there'd be no need for detectives."

He commenced to cough with a persistent vehemence.

"Take me home, Nora," he groaned. "Back to the fireplace and the flannel for the old man. You're always right, Nora. Isn't she always right, Garth?"

But Garth, recalling that moment before Nora and he had entered the Alsop house, shook his head. Nora must have seen and understood, for she laughed lightly.

"Maybe she is," Garth said thoughtfully, "but sometimes I wonder."