But for the necessity to provide for a people the services of general practitioner, Dr. Birney would have made a specialty of children's diseases. The happiest moment he experienced in his profession was a day such as this when he could announce the triumph of his skill and the saving of a young life. There was no sadder one than any day on which he walked out of the sick chamber and at the threshold met the gaunt ancient Presence, waiting to stalk in and take the final charge of the case given up by the vanquished physician. And when a few days later he sat in his buggy on the turnpike at the end of a procession--his healthy little patient stretched prostrate at the other end--he driving there as the public representative of a science that was ages old and that had gathered from all lands the wisdom of the best minds but was still impotent--on such a day he went down to his lowest defeat. He had such faith in the future of his science that he looked forward to the time when there would be no such monstrous tragedy on this planet as infant mortality. No healthy child would ever be allowed to die of disease; disease would never be permitted to reach it, or reaching it, would be arrested as it arrived. The vast multitude of physicians and surgeons now camped around the morning of life, waiting to receive the incoming generations on the rosy mountain-tops of its dawn--nearly all these would be withdrawn; they would move across the landscape of the world and pitch their tents on the plains of waning daylight; there to receive the ragged and broken army that came staggering from the battle-field, every soldier more or less wounded, every soldier more or less weary; there to give them a twilight of least suffering, their sundown of peace; and there to arrange that the great dark Gates closed on them softly. The conversation that morning disclosed among other facts the secret dread of Dr. Birney's life: that the time would come when his children, especially his boy, might begin to imitate him more than he desired. For a long time now he had kept under closest observation the working out in each of them of the law of like attaching itself to like; for already this had borne fruit for both on the vine of his own profession.