spectacles and flapping black garments, the professor did look like a
mammoth black crow.

"Reminds me of the fox and the crow," said Dick, in a low voice, to
his companions.

"Only, in this case, the fox is a bull, and the piece of cheese is the
bag of specimens," added Tom.

They looked about helplessly. There was no farmhouse in sight and the
road did not appear to be much traveled.

"We'll have to go for help," declared Jack.

"The only thing to do," agreed Tom.

The professor was hailed. He had climbed to another limb with infinite
difficulty, because of the encumbering bag of rocks on his back. He
declared that he could manage to get along till the boys came back.

"By a merciful provision of providence," he said whimsically, "bulls
can't climb trees. The situation might be worse if it was a bear."

"It would be unbearable," declared Dick to Tom.

"But just the same there's trouble a brewin'," retorted Tom. "I wish
that farmer would show up."

"As I said before--I don't," responded Jack, as he prepared to start
off.