"I'm afraid I don't know how," replied the country lad.

"Oh, you'll soon learn. I'll be right beside you here, and tell you
what to do."

"Don't upset, please, whatever you do," urged Dorothy.

"I'll try not to," promised Harry.

When they got out of the sheltered cove they felt the full force of
the wind, and for a moment even Nan, who had been on the boat many
times, felt a bit timid. The _Ice Bird_ tilted to one side, the left
hand runner raising high in the air.

"Oh!" screamed Dorothy. "We're going over!"

"No, we're not! Sit still!" cried Bert, grasping the tiller, which
Harry was not holding just right. By turning the ice-boat to one side
the wind did not strike it so hard, and the craft settled down on the
level again.

"There! That's better!" exclaimed Dorothy, who had grabbed hold of
Nan.

"Oh, that's nothing," said Nan. "Bert and I are used to that."

But as the ice-boat proceeded it was evident that those on her were
not going to have an easy time to get to the Bobbsey dock. The wind
blew harder and harder, and the sail seemed ready to rip apart. It