But death that had laid a heavy toll on his companions had turned away from him. Disease and disaster had dogged the mission from the outset. The medical and scientific researches had proved satisfactory beyond expectation, but the attendant loss of life had been terrible, and himself utterly reckless and heedless of all precautions Craven had watched tragedy after tragedy with envy he had been hardly able to hide. Immune from the sudden and deadly fevers that had swept the camps periodically with fatal results he had worked fearlessly and untiringly among the stricken members of the mission and the fast dwindling army of demoralised porters who had succumbed with alarming rapidity. With the stolid Japanese always beside him he had wrestled entire nights and days to save the expedition from extermination. And in the intervals of nursing, and shepherding the unwilling carriers, he had ranged far and wide in search of fresh food to supply the wants of the camp.
The danger he deliberately sought, with a rashness that had provoked open comment, had miraculously evaded him. He had borne a charmed life. He had snatched at every hazardous enterprise, he had exposed himself consistently to risk until one evening shortly before the expedition was due to start on the return march to civilization, when a chance word spoken by the camp fire had brought home to him abruptly the dependence of the remnant of the mission on him to bring them to the coast in safety. By some strange dealing of fate it had been among the non-scientific members of the expedition that mortality had ranged highest; the big game hunters, though hardier and physically better equipped than the students of the party for hardship and endurance had, with the exception of Craven himself, been wiped out to a man. It had been an unpremeditated remark uttered in all good faith with no ulterior motive by a shuddering fever-stricken scientist writing up his notes and diary by the light of the fire with trembling fingers that could scarcely hold the fountain pen that moved laboriously driven by an indomitable will. A grim jest, horrible in its significance, had followed the startling utterance and Craven had looked with perplexity at the shivering figure with its drawn yellow face from which a pair of glittering eyes burned with an almost uncanny brilliance until the meaning of the man's words slowly penetrated. But the true importance of the suggestion once realised had aroused in him a full understanding of the duty he owed to the men he had undertaken to lead.
Of those who could have convoyed the expedition on its homeward march only he remained. Without him the survivors of the once large party might eventually reach safety but it was made clear to him that night how completely his companions relied on him for a quick return and for the management of the train of porters whose frequent mutinies only Craven seemed able to quell. He had sat far into the night, staring gloomily into the blazing fire, smoking pipe after pipe, listening to the multifarious noises of the forest--the sudden distant crash of falling trees, the incessant hum of insect life, the long-drawn howl of beasts of prey hovering on the outskirts of the camp, the soft whoo-whoo of an owl whose cry brought vividly to his mind the cool fragrance of the garden at Craven Towers and the nearer more ominous sounds of muffled agony that came from a tent close beside him where yet another victim of science was gasping his life away.