"Haven't we got time to go to Hope?" asked Sam, a bit wistfully.

"Well, I don't know," answered his big brother, just as wistfully.

"Let us take time-- Doctor Wallington didn't want us to hurry back,"
put in Tom. "I think the girls ought to know about this, so as to be
on guard, in case old Crabtree tries to molest them again."

As the lads were all of one mind, the biplane was headed in the
direction of Hope. As before, the flying machine swung through the air
at a good rate of speed, and half an hour before sundown they came in
sight of the Seminary buildings.

"Wonder where they are?" mused Dick, as the biplane came to earth at
the spot where they had landed before.

"If they are around they must have heard us," answered Tom. "The
engine makes noise enough to wake the dead." And this was well
expressed, for the motor, like many of the flying machine kind, had no
muffler attached, and the explosions were not unlike the firing of a
gatling gun.

Some girls had seen them come down, and presently the boys saw three
figures hurrying towards them.

"Oh, what made you come so late?" cried Grace, as she rushed up and
shook hands with Sam and then with the others.

"We thought you might come to-day," put in Nellie, as she beamed on