"Shut up, Fom," repeated Bep, distinctly. "I said shut up."

There came a deadly silence. Pemberton, in the act of stalking ill-temperedly away, turned bewildered to regard the miracle.

"Say," asked Peter Cody, driven to speech by curiosity. "Say, Fom, do you let your sister boss you like that? I thought you was twins."

Fom looked appealingly at Bep. If Bep would but explain the nature of a shut-up—its power of suddenly depriving one of speech; of making one temporarily dumb in the very midst of a sentence, at the bidding of the winner of a wager, whenever, wherever the caprice to collect the debt of honor occurred to her!

But Bep, after accompanying Mr. Pemberton a few steps, striving to untell him what Fom had betrayed, turned her attention again to mining matters. She knew well what Fom's eyes begged, but hid her head in the Silver King, whence a subterranean giggle came, revealing her enjoyment of the situation.

Fom's stormy eyes filled and the Silver King and the Diamond Heart jigged back and forth till the tears splashed down and cleared her vision.

"Ho—cry-baby!" called Peter Cody. Peter was one of those gallant gentlemen who are never afraid of a playmate when some one else has demonstrated that he can be downed.

At the taunt, a revengeful passion seized Fom, standing there—a lingual Samson shorn of her tongue, two dirty channels plowed down her cheeks by her tears. Deliberately lifting her foot, she brought it down, stamping with all her might again and again.

The soft, loosely packed earth slid smoothly down. The Diamond Heart caved in completely, the almost finished connecting tunnel was a wreck, and the still rolling, moist gravel swept over Bep's head, filling up the Silver King clear to the surface.

By the time Peter had realized their utter ruin, and Bep had shaken the particles of sand and gravel from her hair and ears and throat, Fom was nowhere in sight.