Behind the secular willow, which stands in the centre of the small clearing beside the stagnant pool in the very heart of this dense portion of the forest, a lonely watcher crouched, waiting. He had lain there and waited night after night, and for hours at a stretch the surrounding gloom held him in its close embrace: his ears and senses were strained to hear that uneven footfall, whenever its faint thud broke the absolute silence. To no other sound, no other sight, did he pay any attention, or no doubt he would have noticed that in the thicket behind him another watcher cowered. The stalker was stalked in his turn: the watcher was watched. Someone else was waiting in this dense corner for the man with the wooden leg—a small figure rapped in a dark mantle, a silent, furtive creature, more motionless, more noiseless than any beast in its lair.
At last, to-night, that faint, uneven thud of a wooden stump against the soft carpet of the woods reached the straining ears of the two watchers. Anon the feeble flicker of a dark lanthorn was vaguely discernible in the undergrowth.
The man who was crouching behind the willow drew in his breath with a faint, hissing sound; his hand grasped more convulsively the pistol which it held. He was lying flat upon his stomach, like a creeping reptile watching for its prey; his eyes were fixed upon the tiny flickering light as it slowly drew near towards the stagnant pool.
In the thicket behind him the other watcher also lay in wait: his hand, too, closed upon a pistol with a firm and determined grip; the dark mantle slid noiselessly down from his shoulders. But he did not move, and not a twig that helped to give him cover, quivered at his touch.
The next moment a man dressed in a rough blouse and coarse breeches and with a woollen cap pulled over his shaggy hair came out into the clearing. He walked deliberately up to the willow tree. In addition to the small dark lantern which he held in one hand, he carried a spade upon his shoulder. Presently he threw down the spade and then proceeded so to arrange the lantern that its light fell full upon one particular spot, where the dry moss appeared to have been recently disturbed. The man crouching behind the willow watched his every movement; the other behind the thicket hardly dared to breathe.
Then the newcomer did a very curious thing. Sitting down upon the soft, sodden earth, he stretched his wooden stump out before him: it was fastened with straps to the leg which was bent at the knee, the shin and foot beyond appearing like a thick and shapeless mass, swathed with bandages. The supposed maimed man, however, now set to work to undo the straps which bound the wooden stump to his leg, then he removed the stump, straightened out his knee, unwound the few mètres of bandages which concealed the shape of his shin and foot, and finally stood up on both legs, as straight and hale as nature had originally made him. The watcher behind the willow had viewed all his movements with tense attention. Now he could scarcely repress a gasp of mingled astonishment and rage, or the vengeful curse which had risen to his lips.
The newcomer took up his spade and, selecting the spot where the moss and the earth bore traces of having been disturbed, he bent to his task and started to dig. The man behind the tree raised his pistol and fired: the other staggered backwards with a groan—partly of terror and partly of pain—and his left hand went up to his right shoulder with a quick, convulsive gesture. But already the assassin, casting his still smoking pistol aside, had fallen upon his victim; there was a struggle, brief and grim, a smothered call for help, a savage exclamation of rage and satisfied vengeance, and the wounded man fell at last with a final cry of horror, as his enemy's grip fastened around his throat.
For a second or two the murderer stood quite still contemplating his work. With a couple of vigorous kicks with his boot he turned the body callously over. Then he picked up the lanthorn and allowed the light to play on the dead man's face; he gave one cursory glance at the straight, marble-like features, and at the full, shaggy beard and hair which disfigured the face, and another contemptuous one at the wooden stump which still lay on the ground close by.
"So dies an informer!" he ejaculated with a harsh laugh.
He searched for his pistol and having found it he tucked it into his belt; then putting his fingers to his lips he gave a cry like that of a screech-owl. The cry was answered by a similar one some little distance away; a minute or two later another man appeared through the undergrowth.