It was a cannon, and was very near.
"What is that ?" asked the boys in a breath.
"A sunrise gun, I think," said Sam, "and it's on a ship or a fort.

Now then all together with a shout." They shouted in concert.

No answer came.

They shouted again and again, and finally their shout was answered.

A little later a row boat came out into the fog, and the first man Sam saw in it was Tandy Walker.
It is not necessary to repeat the greetings and the explanations that were given.