Her eyes blinked rapidly, as though holding back tears. "I know what's the matter with you; I really know."

"There's nothing the matter with me that—"

"That beating this mess won't solve." We hadn't heard Mel enter. He leaned casually against the door. "Terrific idea for a story."

I shrugged. "Seems to be homecoming night."

"Not quite," he glanced at his watch, "but wait another few minutes."

He was right: Harry, out of breath, was the last of the GG to arrive.

"Now what?" I asked. "Surely this meeting isn't an accident?"

Dex said thoughtfully, "No, not really, but it is in the sense you mean. We didn't agree to appear tonight. Yet logically, it's time for the temperature problem—well, I guess each of us came down to help."

What could I do? That was the GG, characteristically, so we talked temperatures.

"What I was thinking," Harry began slowly, "was a sort of superthermostat." Harry, as usual, came to the right starting point.