They sprang to their feet and hurried to the shore toward the town. They parted the bushes on the bank and peered out over the water. The little steam ferryboat was about a mile below the village, drifting with the current. Her broad deck seemed crowded with people. There were a great many skiffs rowing about or floating with the stream in the neighborhood of the ferryboat, but the boys could not determine what the men in them were doing. Presently a great jet of white smoke burst from the ferryboat’s side, and as it expanded and rose in a lazy cloud, that same dull throb of sound was borne to the listeners again.

“I know now!” exclaimed Tom; “somebody’s drownded!”

“That’s it!” said Huck; “they done that last summer, when Bill Turner got drownded; they shoot a cannon over the water, and that makes him come up to the top. Yes, and they take loaves of bread and put quicksilver in ’em and set ’em afloat, and wherever there’s anybody that’s drownded, they’ll float right there and stop.”

“Yes, I’ve heard about that,” said Joe. “I wonder what makes the bread do that.”