How Cora's heart did thump! Duncan was going in his machine, and, like all doctors, he always preferred to have a man drive—his chauffeur was most skilful—doctors, even when young in their profession, do not willingly risk being stalled.

But in spite of Cora's one guiding rule—"When you make up your mind stick to it"—she had many misgivings between that evening when her plans were made, and the next morning when she was to start off with Duncan Bennet. The other girls had gone out to an evening play in Forest Park, one of the real attractions of Breakwater, and at the last moment Cora excused herself upon some available pretense so that she was able to get her things together and see that her machine was safely put up, and then be ready to start off in the morning before the other girls had time to realize she was going.

"It does seem," she reflected, "that I am always getting runaway rides." Then she recalled how Sid Wilcox actually did run away with her once, as related in the "Motor Girls." "And," she told herself, "I seem to like running away with boys."

This was exactly what worried Cora; she knew that others would be apt to make this remark. "But I cannot help it this time," she sighed. "I have to go to Chelton, or—"

Cora was looking very pretty. Excitement seems to put the match to the flickering taper of beauty, hidden behind the self-control of healthy maidenhood. Her cheeks were aflame and her eyes sparkled so like Jack's when he was sure of winning a hard contest.

"Dear old Jack!" she thought. "Won't he be surprised to see me! That will be the best part of it. They will all be so surprised."

She went down to the study, where she was sure to find Duncan.

"I suppose your mother has told you of my mad impulse," she began rather awkwardly. "Do you think the folks will be glad to see me?"

What a stupid remark! She had no more idea of saying that than of saying: "Do you think it will snow?" But, somehow, when he put up his book and looked at her so seriously, she could not help blundering.

"They ought to be," he said simply. Then she saw that he was preoccupied—scarcely aware that she was present.