together again so easily! One lives and one learns, you know!"

"But it needn't be the same one, need it?" said Bruno. " Wo'n't it do, if I live, and if Sylvie learns?"

"I c'an't learn without living!" said Sylvie.

"But I can live without learning!" Bruno retorted. "Oo just try me!"

"What I meant, was——" the Professor began, looking much puzzled, "——was——that you don't know everything, you know."

"But I do know everything I know!" persisted the little fellow. "I know ever so many things! Everything, 'cept the things I don't know. And Sylvie knows all the rest."

The Professor sighed, and gave it up. "Do you know what a Boojum is?"

"I know!" cried Bruno. "It's the thing what wrenches people out of their boots!"

"He means 'bootjack,'" Sylvie explained in a whisper.

"You ca'n't wrench people out of boots," the Professor mildly observed.

Bruno laughed saucily. "Oo can, though! Unless they're welly tight in."