The author was about to renew his thanks when there came a sound of scratching at the door, and the doctor sprang up quickly.

“It’s time for me to go. I left my dog on the step, but I suppose⁠—”

Before he had time to open the door, it had yielded to the pressure behind it and flew wide open to admit a great yellow-haired collie. The dog, wagging his tail and contorting his whole body with delight, tore across the floor and tried to leap up upon his owner’s breast. And there was laughter and happiness in the old eyes; for they were clear again as the day.