There were few airholes between the Long Bridge and the lake (Dan and Billy covered the entire length of the river between those two places) and almost no spots where the swiftness of the current made the ice weak. As for the tides—the ice was too firm now to be affected by ordinary tides above the Boat Club Cove.
As Bromley’s dock was above the Long Bridge, few of their mates saw the Speedwells’ craft at all. The Speedwell house was within a short distance of John Bromley’s and not many of the academy boys and girls lived at this end of Riverdale.
So what the Fly-up-the-Creek could do was known only to Dan and Billy. They sailed her one night away up the river, past Meadville, the mills, and the penitentiary, and so on to the entrance to Karnac Lake. It was certainly a great sail.
“Would you believe she’d slide along so rapidly with nothing but a puff of wind now and then?” gasped Billy, as they tacked and came about for the return run.
“That’s all right,” Dan returned. “But suppose we got off so far and the wind gave out on us altogether? Wouldn’t that be an awful mess?”
“Gee!” exclaimed Billy, laughing. “We ought to have an auxiliary engine on her—eh? How about it, boy?”
“Why, Billy!” exclaimed Dan, “that might not be such a bad idea.”
“Wouldn’t work; would it?” asked the younger boy, curiously. “I only said that for a joke.”
“Well——”
“You’re not serious, Dan?” gasped Billy, seeing his brother’s thoughtful face.