For a man who during the last twenty-four hours had looked straight into the face of death, and had also discovered that he was deeply in love, it must be admitted that Colin got through the morning's task with considerable credit. It was no light session either, for, in addition to his ordinary round of visits, he was faced, as he had predicted, by an exceptionally heavy list of callers, several of whom were still indignant over their fruitless vigil on the previous evening. An occasional glimpse of Nancy, however, as she gravely entered the surgery with some necessary reference or address, was sufficient to refresh his energies, and by one-thirty his somewhat exhausting programme was practically complete. He was, indeed, in the very act of dismissing his last patient when a taxicab drove up to the door, and the sturdy, untidy figure of Mark bundled out on to the pavement. Nancy must have seen him, too, from the study window, for as the front door opened Colin heard her voice in the hall, and the next moment the pair of them entered the surgery. Mark thrust out his hand and wrung Colin's heartily. "I needn't ask how everything is," remarked the latter. "You look too damn cheerful for anything but good news." "That's right," returned Mark, tossing his hat on to a chair. "The operation went off like clockwork, and I left the old lady sitting up in bed having a cup of tea with Mary. She'll be as fit as a fiddle in another fortnight." He stepped forward to the table and glanced casually down at the consulting book. "By Jove, you've had some patients," he exclaimed. "I hope you haven't been bored stiff." Nancy's lips twitched, and, as though moved by a similar impulse, Colin suddenly burst into a chuckle of laughter. "No," he replied drily, "I can't exactly say I've been bored." Mark looked questioningly from one to the other of them. "What's the joke?" he demanded. As he spoke Martha Jane appeared in the doorway. "Lunch is ready," she announced, "if you'd like me to bring it up." Colin slipped his arm through Mark's. "You shall hear all about it when we've had something to eat," he answered. "I've been healing the sick ever since half-past nine, and I'm beginning to faint for want of nourishment." "I'll go along to the cellar and get out a bottle of fizz," suggested Mark. "I think you and Nancy are both entitled to a drink." Once more Colin laughed appreciatively. "Yes," he said, "under the circumstances I suppose we are." * * * * * * * * * "And now," observed Mark, as he pushed his coffee cup away half an hour later, "I'd like to know what you two sunny-hearted infants were giggling at when I made that innocent remark in the surgery." Colin glanced at Nancy. "Shall I tell him?" he asked, "or will you?" "Oh, you," said Nancy decisively. "The police will want to know all about it, so it's just as well you should have a rehearsal."