Must I point out how useless it has always been for you to match yourself, merely a skilful gunman, against me, against a brain?"

"Usually," the cold whisper came back, "the brain has failed in the traps it has laid for the gunman."

"Only because of the mistakes of its agents. Unfortunately for you, the brain is dealing with you directly this time, my friend. It's quite a different matter. But this small talk—although you honor——"

"Of course you intend to kill me," said the Hawk. "But when?"

Dr. Ku gestured deprecatingly. "You insist on introducing these unpleasant topics! But to relieve your mind, I've not yet decided how I can entertain you most suitably. I have come primarily to ask you one trifling thing."

"And that is?"

"The whereabouts of Master Scientist Eliot Leithgow."

Hawk Carse smiled. "Your conceit lends you an extraordinary optimism, Dr. Ku."

"Not unfounded, I am sure. I desire very much to meet our old friend Leithgow again: his is the only other brain in this universe at all comparable to mine. And did I tell you that I always get what I desire? Well, will you give me this information? Of course, there are ways...."

For a moment he waited.

The Hawk only looked at him.

"Always in character," the Eurasian said regretfully. "Very well." He turned his head and took in Friday and Sako, standing near-by. "You are Sako?" he asked the latter. "It is most unfortunate that you had to deceive me a little while ago. We shall have to see what to do about it. Later. For the present, move farther back, out of the way. So. You, black one, next to my friend Carse: we must be moving along. So."

Ku Sui surveyed then with inscrutable eyes. Gracefully, he drew close.

Carse missed not a move. He watched the Eurasian draw, from one of the long sleeves of his blouse, a square of lustrous black silk.

"This bears my personal insignia, you see," he murmured. "You will remember it." And he languidly waved it just under their eyes.

Friday stared at it; Carse too, wonderingly. He saw embroidered in yellow on the black a familiar insignia composed of an asteroid in the circle of ten planets. And then alarm lit his brain and he grimaced. There was a strange odor in his nostrils and it came from the square of silk.

"Characteristic, Dr. Ku," he said. "Quite characteristic."

The Eurasian smiled. An expression of stupid amazement came over Friday's face. The design of asteroid and planets wavered into a blur as the Hawk fought unconsciousness; a short, harsh sound came from his lips; he lurched uncertainly. The negro crumpled up and stretched out on the deck. Carse's desire to sleep grew overpowering. Once more, as from a distance, he glimpsed Ku Sui's smile. He tried to back to the wall; made it; then a heavy thump suggested to his dimming mind that he had collapsed to the deck. He was asleep at once....

CHAPTER IV

Soil

Hawk Carse awoke with a slight feeling of nausea, and the smell of the drug faint in his nostrils. He found he was lying on the floor of a large, square cell whose walls and ceiling were of some burnished brown metal and which was bare of any kind of furnishing. In one wall was a tightly closed door, also of metal and studded by the knob of a lock. Barred slits, high in opposite walls, gave ventilation; a single tube set in the ceiling provided illumination.

He was not bound. He sat up and regarded the outflung figure of Friday, lying to one side. "Something in his look seemed to reach the giant negro, for, as he watched, the man's eyelids flickered, and a sigh escaped his full lips. He stared up at Carse, recognition, followed by gladness, flooding his eyes. The Hawk smiled also. There were close bonds between these two.

"Lord, I'm sure thankful to be with you, suh!" said the negro with relief. His eyes rolled as he took in the cabinlike cell. "Hmff—nice homey little place," he remarked. "Where do you reckon we are, suh?"

"I think we're at last at that place we have searched so long for—Ku Sui's headquarters, his own spaceship."

It will be remembered by those who have read their history that the Eurasian's actual base of operations was for a long time the greatest of the mysteries that enveloped him. Half a dozen times had the Hawk and his comrade in arms, Eliot Leithgow, hunted for it with all their separate skill of adventurer and scientist, and, although they had twice found the man himself, always they had failed to find his actual retreat.

For those who are unacquainted with the histories of that raw period a hundred years ago, it will be impossible to understand the spell of fear which accompanied mention of Dr. Ku throughout the universe—a fear engendered chiefly by the man's unpredictable comings and goings, thanks to his secret hiding place. Those who were as close to him as henchmen could be—which was not very close—only added to the general mystery of the whereabouts of the base by their sincerely offered but utterly contradictory notions and data. One thing all agreed on: the outlaw's lair was a place most frightening.

Therefore it can be understood why, on hearing the Hawk's opinion, Friday's face fell somewhat.

"Guess that means we're finished, suh," he opined moodily.

Carse had walked to the lone door and found, as he of course expected, that it was tightly locked. He responded crisply:

"It's not like you to talk that way, Eclipse. We're far from that. We have succeeded in the first step—if, as I suspect, this cell is part of Dr. Ku's real headquarters—and surely before he decides to eliminate us we will be able to learn something of the nature of his space-ship; perhaps how it can be attacked and conquered."

Conversation always cheered the naturally social Friday; he seldom had the opportunity for it with his usually curt master. He objected:

"But what good'll that do us, suh, if we take what we've learned to where it won't help anybody, least of all us? An' what chance we got against Ku Sui now, when we're prisoners? Why, he's a magician; it ain't natural, what he does. Lands in our ship plop right out of empty space! Puts us out with a wave of his handkerchief!" With final misery in his voice he added: "We're sunk, suh. This time we surely are."

Carse smiled at his emotional friend. "All you need is a good fight, Eclipse. It's thinking that disintegrates your morale; you should never try to think. Why—there was an anesthetic on that handkerchief! Simple enough; I might have expected it. As for his getting into our ship, he entered from behind, through the after port-lock, while we were looking for his ship on the visi-screen. I don't understand yet why we could not see his craft. It's too much to suppose he could make it invisible. Paint, perhaps, or camouflage. He might have a way of preventing, from a distance, the registering of his ship on our screen. Oh, he's dangerous, clever, deep—but somewhere, there'll be a loophole. Somewhere. There always is." His tone changed, and he snapped: "Now be quiet. I want to think."

His face stiffened into a cold, calm mask, but behind his gray eyes lay anything but calmness. Ku Sui's easy assumption that the information as to Eliot Leithgow's whereabouts would be forthcoming from his lips, puzzled him, brought real anxiety. Torture would probably not be able to force his tongue to betray his friend, but there were perhaps other means. Of these he had a vague and ominous apprehension. Dr. Ku was preeminently a specialist in the human brain; he had implied his will to have that information. Suppose he should use something it was impossible to fight against?

And he alone, Hawk Carse, brought the responsibility. He had asked Leithgow