“I thought of that the first thing,” Billie confessed. “But, after all, we have only suspicions to go on so far. What the police want is proof.”

“Then why not get busy and produce the proof?” cried Laura.

“Exactly! We may have to call in the boys to help. In fact, I think it would be a good idea to ask their help. We may need it.”

Vi, who had been eying Billie thoughtfully, blurted out:

“You have some definite plan in mind, Billie. I can tell by the look of you. Come clean now. What is it?”

“Well, I’ll tell you.”

Whereupon Billie outlined her plan. It was that she and Laura and Vi, Edina too, if she liked, would enter into a plot to search Maria Tatgood’s room.

“Vi and I will look through the maid’s things—she is almost certain to have some of the money hidden about the house—while you and Edina, Laura, keep watch to see that we are not interrupted.”

“Now is a good time,” Vi suggested. “Nearly everybody is still on the courts discussing the tournament. Whatever we do will be likely to pass unnoticed.”

“All right. Come ahead!” replied Billie.