“Quite a good deal more.” The small eyes beamed and danced at her. “Yes, I should say she’s buying quite a good deal more than usual these days. Which is gratifying to an old chap who has to make his living trundling a store about on wheels. Ain’t it, now?”

Billie agreed that it was and, reminded of her own deep obligation to Dan Larkin, she emulated the good example of Mrs. Tatgood and bought several things of him, all of which she could have done very well without.

Scarcely able to believe in her good fortune, Billie returned as quickly as possible to Three Towers Hall. All during the ride in the street car she debated the question as to whether it would be wise to confide her extraordinary news to Laura and Vi.

“Not just yet,” was her decision. “Monday and Tuesday are the days of the tennis tournament. I’ll wait till after that. Meantime,” imitating Mr. Dan Larkin, “I’ll keep my eyes open. Oh, won’t I just!”

The next day Billie went about radiating so much joyfulness that her chums were curious. Some of them even went so far as to be suspicious.

“Billie Bradley looks like the cat who has just swallowed the canary,” said Jessie Brewer. “I wonder,” musingly, “if she could have had a hand in the disappearance of that Gift Club money!”

“Don’t be a goose!” said her companion shortly. “Billie Bradley would never steal anything!”

However, the seed of doubt had been planted, and it grew!

Toward the end of the long pleasant Sunday, Billie’s mood of optimism began to wane somewhat. After all, argued the still, small voice of her pessimism, even though she had turned up a red-hot clue, what right had she to believe that she would be able to follow it through to a successful conclusion? It was not a very convincing clue, she told herself, and she was not very experienced in running down clues or trails of any kind.

If only to-morrow were not the beginning of the tennis tournament! If only—if only——