ure, drawn in blue pencil. It is marked Fort, but it
looks like Sparr's hotel."

"And look what it says!" cried Dave, eying the crude drawing. "'Powder
House to be blown up'! That's the dining-room, as plain as day!"

"And down here it says, 'Dynamite will do it easily,' and signed,
'King of Sumatra.' Dave, he did it, and this proves it."

"It certainly looks that way, Roger."

"Let me see that drawing!" burst out Nat, and would have snatched it
from Roger's hand had not Dave stopped him.

"You can look at it, Nat, but you must give it back," said our hero.

"What for? My uncle drew that and I have a right to it."

"No, I am going to hand this over to Doctor Clay and then to the
Oakdale authorities. It may be needed to clear Phil, Ben, and
Buster."

"Hurrah, Dave, that's the talk!" cried Roger, with sudden enthusiasm.
"I didn't think of it, but that is just what is needed to clear 'em!
We'll knock Jason Sparr's accusations into a cocked hat!"

"You let me see that drawing!" shouted Nat, making another grab for
it. "I've got a right to it--if my uncle made it."

"You can look at it, but you can't handle it," said Dave, and he gave
Roger a look that the senator's son well understood. Both knew that
the money-lender's son could not be trusted with such an important bit
of evidence.

The drawing was held up, but Nat was not permitted to get too close to
it. He looked it over carelessly and then his lip curled.

"Huh! I don't think my uncle drew it," he said.

"And we think he did," returned Dave.

There was a sudden silence after this. Each boy was busy with his
thoughts. Dave felt particularly light-hearted.

"This ought to clear Phil and the others," he reasoned. "And they can
come back to school without delay and finish the term and graduate."

Having packed up his things, Nat got out his bicycle and prepared to
ride back to Oak Hall, and the others did the same.

"Going to give me that drawing?" asked the money-lender's son, just as
he was ready to start off.

"No, we are going to turn it over to Doctor Clay," said Roger.

"All right, have your own way," growled Nat.

As in coming to the cabin, the money-lender's son took the lead in the
return to Oak Hall. Dave and Roger kept close behind and occasionally
spoke of the happenings in guarded tones. When the school was reached
all left their bicycles in the gymnasium.

"Going to Doctor Clay now?" demanded Nat.

"We might as well," said Dave. "Th