drift."

Rick answered, "Please don't believe everything Barby tells you. She
exaggerates, sort of."

"I do not," Barby answered emphatically. "We do have adventures.
Besides, Jan already knew about some of them, because she read about
Spindrift in the papers. And she's already a member of the Mob,
because I invited her!"

Rick interpreted Barby's glare correctly. It said that if he wasn't
gracious and nice to their new guest, he would have his sister to
reckon with, and, as he knew full well, she was no mean adversary.

"Fine," he said. "Welcome to the Mob, Miss Morrison. We'll assign you
the subject of economic history."

"Jan, please," she answered, then smiled shyly. "But couldn't I have
another subject? I'm just not the type to know much about economics, I
guess."

"That's just the point," Scotty explained.

Barby had a serious look on her pert face. "Of course Rick's idea
about stealing a million from quiz shows was just a joke. But, Rick,
you gave me an idea--if you'll co-operate."

"It depends on the idea," Rick answered warily.

"Oh, don't be so cautious. I'm not trying to trap you into taking me
on any trips." Barby referred to the promise she had once wangled out
of her brother that she could go on the next expedition, a promise
that had gotten the Spindrift young people entangled in a hazardous
adventure in the far-off South Seas.

Rick perched on the arm of a sofa. "Okay. Let's have it."

"Well, I was thinking about the Harvest Moon Show at school." She
explained, in an aside to Jan, "Every October the high school puts on
a big variety show in the city auditorium to raise money for the
school athletic fund. Rick said he could make me a radio receiver that
I could wear in my hair."

"He can," Scotty interjected. "Remember the control radios we made for
the Tractosaur? He could make one for you the same way."

The Tractosaur was a "thinking bulldozer" the Spindrift scientists had
designed.

Barby continued, "I know you can make a small transmitter that will
fit in your pocket, because that's all the Tractosaur control was,
really. Well, if I wore a receiver that no one could see, and if you
carried a transmitter that no one could see, we could put on the most
wonderful mind-reading act in history!"

Rick's quick imagination elaborated on Barby's words. It was a great
idea! He could work among the audience, while Barby sat blindfolded on
the stage. He would choose a person in the audience a