," and he passed over some bits of celery he had in his
pocket.

A cautious rap on the iron door, and it was unbolted by Walt Baxter, who
had been assigned to that duty.

"How about it--is the coast clear?" whispered Andy anxiously.

"I think so; but wait a minute and I'll make sure," whispered Walt in
return.

Soon he came back with word from Fatty and Ned that the rear hall of the
school was practically deserted. Ned had already tried several keys in
the door to Asa Lemm's apartment, and unlocked it.

It was by sheer good luck that the boys managed unobserved to get the
two goats into the school through two hallways and at last into the room
of the hated professor.

On one side of the professor's bedroom there was a large clothing
closet, and in this the two goats were placed.

"Now we'll take off their harness," said Jack. "There is no use in
getting that snarled up or damaged."

"I'm going to fix up some new harness for them," announced Randy. "Come
on, Andy."

His twin understood, and while the others remained on guard in the
hallway, Randy and Andy lost no time in decorating the two goats with
various articles of Professor Lemm's wearing apparel. They buttoned a
coat around each goat like a blanket, and got a bright green sweater
over one goat's head and around his neck. Then they found a number of
used neckties in a chiffonier, and these were tied on the goat's legs
and horns.

"They sure do look like some goats now!" cried Andy gaily. Then the
animals were shoved back into the closet and the door closed.

"Is the coast still clear?" asked Randy, as they came out of the
bedroom.

"It is. But I don't think Lemm will stay downstairs much longer,"
answered Jack.

"Will you fellows come down again? I've got another idea!" burst out
Randy. "Come on--quick!"

Not knowing what was in the wind, the others followed him through the
hallway and down the fire-escape once more. Then he led them to a place
behind the garage. Here were a number of flat boxes, which, in the
springtime, had been used for raising plants. These boxes had had a
small amount of water in them, and were now filled with thin sheets of
ice.

"Let's take a few of those sheets of ice upstairs," said Randy. "They'll
fit in very nicely between the sheets on old Lemon's bed."

All of the others caught at the suggestion with avidity, and in a very
few minutes each of the boys was mounting the fire-escape once again,
this time with a larg