nipped in the bud by a strange shrieking wail, which seemed to come from the direction of the bluffs at my right.

Naked and unarmed, as I was, my end would have been both speedy and horrible at the hands of these cruel creatures had I had time to put my resolve into execution, but at the moment of the shriek each member of the herd turned in the direction from which the sound seemed to come, and at the same instant every particular snake-like hair upon their heads rose stiffly perpendicular as if each had been a sentient organism looking or listening for the source or meaning of the wail. And indeed the latter proved to be the truth, for this strange growth upon the craniums of the plant men of Barsoom represents the thousand ears of these hideous creatures, the last remnant of the strange race which sprang from the original Tree of Life.

Instantly every eye turned toward one member of the herd, a large fellow who evidently was the leader. A strange purring sound issued from the mouth in the palm of one of his hands, and at the same time he started rapidly toward the bluff, followed by the entire herd.

Their speed and method of locomotion were both remarkable, springing as they did in great leaps of twenty or thirty feet, much after the manner of a kangaroo.

They were rapidly disappearing when it occurred to me to follow them, and so, hurling caution to the winds, I sprang across the meadow in their wake with leaps and bounds even more prodigious than their own, for the muscles of an athletic Earth man produce remarkable results when pitted against the lesser gravity and air pressure of Mars.

Their way led directly towards the apparent source of the river at the base of the cliffs, and as I neared this point I found the meadow dotted with huge boulders that the ravages of time had evidently dislodged from the towering crags above.

For this reason I came quite close to the cause of the disturbance before the scene broke upon my horrified gaze. As I topped a great boulder I saw the herd of plant men surrounding a little group of perhaps five or six green men and women of Barsoom.

That I was indeed upon Mars I now had no doubt, for here were members of the wild hordes that people the dead sea bottoms and deserted cities of that dying planet.

Here were the great males towering in all the majesty of their imposing height; here were the gleaming white tusks protruding from their massive lower jaws to a point near the centre of their foreheads, the laterally placed, protruding eyes with which they could look forward or backward, or to either side without turning their heads, here the strange antennae-like ears rising from the tops of their foreheads; and the additional pair of arms extending from midway between the shoulders and the hips.

Even without the glossy green hide and the metal ornaments which denoted the tribes to which they belonged, I would have known them on the instant for what they were, for where else in all the universe is their like duplicated?

There were two men and four females in the party and their ornaments denoted them as members of different hordes, a fact which tended to puzzle me infinitely, since the various hordes of green men of Barsoom are eternally at deadly war with one another, and never, except on that single historic instance when the great Tars Tarkas of Thark gathered a hundred and fifty thousand green warriors from several hordes to march upon the doomed city of Zodanga to rescue Dejah Thoris, Princess of Helium, from the clutches of Than Kosis, had I seen green Martians of different hordes associated in other than mortal combat.

But now they stood back to back, facing, in wide-eyed amazement, the very evidently hostile demonstrations of a common enemy.

Both men and women were armed with long-swords and daggers, but no firearms were in evidence, else it had been short shrift for the gruesome plant men of Barsoom.

Presently the leader of the plant men charged the little party, and his method of attack was as remarkable as it was effective, and by its very strangeness was the more potent, since in the science of the green warriors there was no defence for this singular manner of attack, the like of which it soon was evident to me they were as unfamiliar with as they were with the monstrosities which confronted them.

The plant man charged to within a dozen feet of the party and then, with a bound, rose as though to pass directly above their heads. His powerful tail was raised high to one side, and as he passed close above them he brought it down in one terrific sweep that crushed a green warrior's skull as though it had been an eggshell.

The balance of the frightful herd was now circling rapidly and with bewildering speed about the little knot of victims. Their prodigious bounds and the shrill, screeching purr of their uncanny mouths were well calculated to confuse and terrorize their prey, so that as two of them leaped simultaneously from either side, the mighty sweep of those awful tails met with no resistance and two more green Martians went down to an ignoble death.

There were now but one warrior and two females left, and it seemed that it could be but a matter of seconds ere these, also, lay dead upon the scarlet sward.

But as two more of the plant men charged, the warrior, who was now prepared by the experiences of the past few minutes, swung his mighty long-sword aloft and met the hurtling bulk with a clean cut that clove one of the plant men from chin to groin.

The other, however, dealt a single blow with his cruel tail that laid both of the females crushed corpses upon the ground.

As the green warrior saw the last of his companions go down and at the same time perceived that the entire herd was charging him in a body, he rushed boldly to meet them, swinging his long-sword in the terrific manner that I had so often seen the men of his kind wield it in their ferocious and almost continual warfare among their own race.

Cutting and hewing to right and left, he laid an open path straight through the advancing plant men, and then commenced a mad race for the forest, in the shelter of which he evidently hoped that he might find a haven of refuge.

He had turned for that portion of the forest which abutted on the cliffs, and thus the mad race was taking the entire party farther and farther from the boulder where I lay concealed.

As I had watched the noble fight which the great warrior had put up against such enormous odds my heart had swelled in admiration for him, and acting as I am wont to do, more upon impulse than after mature deliberation, I instantly sprang from my sheltering rock and bounded quickly toward the bodies of the dead green Martians, a well-defined plan of action already formed.

Half a dozen great leaps brought me to the spot, and another instant saw me again in my stride in quick pursuit of the hideous monsters that were rapidly gaining on the fleeing warrior, but this time I grasped a mighty long-sword in my hand and in my heart was the old blood lust of the fighting man, and a red mist swam before my eyes and I felt my lips respond to my heart in the old smile that has ever marked me in the midst of the joy of battle.

Swift as I was I was none too soon, for the green warrior had been overtaken ere he had made half the distance to the forest, and now he stood with his back to a boulder, while the herd, temporarily balked, hissed and screeched about him.

With their single eyes in the centre of their heads and every eye turned upon their prey, they did not note my soundless approach, so that I was upon them with my great long-sword and four of them lay dead ere they knew that I was among them.

For an instant they recoiled before my terrific onslaught, and in that instant the green warrior rose to the occasion and, springing to my side, laid to the right and left of him as I had never seen but one other warrior do, with great circling strokes that formed a figure eight about him and that never stopped until none