"Look out now, boys," he called, "I'm going to light the fuse. I didn't make a heavy charge, but it might do some damage, so we'll go outside."
They hurried from the place, with its silent guests and waiters, and reached the street. A moment later there sounded a dull explosion.
"Now, let's see what we've got!" called Jack.
Back to the kitchen they ran, the two boys in the lead.
"Why—why—the stone has disappeared!" cried Jack, in disappointment, as he glanced all around.
"Yes, but look here," added Mark. "Here are bits of meat," and he picked up from the stone table some scraps of meat.
"Is it really roast beef?" cried Jack. "Good to eat?"
Mark smelled of it. Then he put the morsel cautiously to his lips. The next instant it had disappeared. It was proof enough.
"Good! I should say it was good!" exclaimed Mark. "I wish there was more of it! What happened to the rock of meat, Andy?"
"I used too heavy a charge, and it blew all to pieces. I'll know better next time. There are lots more chunks of meat, and we'll soon have a feast. I'll make another bombshell."