"That's so," exclaimed Charley. "I forgot all about it. Go to the bow, Joe, and keep the sharpest kind of a look-out. Boys, I'm not fit to be Captain, for I've neglected one of the first duties of an officer."

"We'll forgive you," said Harry. "Especially as I don't believe there's another boat on the bay to-day."

"Of course there isn't really much danger of running into anything, unless it may be a sloop lying at anchor. Still, we—"

"What's that?" exclaimed Tom.

"Sail on the port bow!" yelled Joe, at the top of his lungs.

While Joe was still speaking, the mainsail of a big cat-boat suddenly loomed up through the fog, and before the least thing could be done to avoid a collision, the strange boat struck the Ghost amidships, and a chorus of girls' voices cried out, "Oh, my!"

"No harm done," called out Charley. "Let go the jib-sheet, Joe. Now hold on to the side of that boat, boys, and don't let her get away till we see if she is damaged." So saying, he put the helm hard down, bringing the Ghost up into the wind. The other boat had already dropped her sail, and the two vessels were soon lying quietly side by side.

On board the cat-boat were four girls, three of them about fourteen years old, and the fourth about ten. There was also a boy, who did not seem to be as old as Joe, but who was apparently one of the "Bay boys," who spend most of their time during the summer in sailing boats of various kinds, and who at twelve years old are often thoroughly good sailors. The boy did not seem in the least alarmed, but the girls were terribly frightened.

"Do, please, help us," implored the tallest and prettiest of the four, addressing Charley almost as respectfully as if he were a man. "We are awfully afraid to be out here in this fog."

"May I ask how you came to be out here?" asked Charley.