“Quiet! Listen!”

Dickenson drew his breath hard and strained his ears instead of his eyes.

“Well? Can’t hear anything.”

“Hist! Listen again.”

There was a pause.

“Hear anything?”

“Yes; but I don’t know what it is,” said Dickenson, laying a hand behind one ear and leaning forward with his head on one side.

“What does it sound like?”

“Something like a heavy wagon coming along a road with its wheels muffled.”

“Heavy wagon drawn by oxen?”