Daddy Bunker put his hands to his mouth, to make a sort of megaphone, and called: 

“Sit down, Margy!  Sit down, Mun Bun!  Sit down and keep quiet and Daddy will soon come for you.  Sit down and keep still!”

Mun Bun and his little sister did as their father told them, and sat down in the middle of the boat.

“Now we’ll get them all right,” said Mr. Bunker to his wife.  “Don’t worry—­they will be all right.”

Cousin Tom ran out on the end of his pier.  He waved his hands to the man in the motor-boat, who was a lobster fisherman, going out to “lift” his pots.

“Wait a minute!” called Cousin Tom.  “Two children are adrift in that boat.  We want to go after them!”

The lobster fisherman waved his hand to show that he understood.  The motor of his boat was making such a noise that he could not make his voice heard, nor could he tell what Cousin Tom was saying.  But he knew what was meant, for he saw the drifting boat.

With another wave of his hand to show that he knew what was wanted of him, the lobsterman steered his boat toward Cousin Tom’s wharf.  A few minutes later Daddy Bunker and Cousin Tom were in it, and were speeding down Clam River after the drifting craft in which sat Margy and Mun Bun.

“How did it happen?” asked Mr. Oscar Burnett, the lobster fisherman, as he steered his boat down stream.

“I don’t know,” answered Daddy Bunker “All I know is my wife called to me to come out, and I saw the two tots drifting off in the boat.”

“They must have climbed in to play when the boat was tied to the wharf,” said Cousin Tom.  “Then either they or some one else must have loosened the rope.”

“Maybe it came loose of itself,” suggested Daddy Bunker.

“It couldn’t,” said Cousin Tom.  “I tied it myself, and I am a good enough sailor to know how to tie a boat so it won’t work loose.”

“Yes, I guess you are,” said Mr. Burnett.  “The youngsters must have loosened the rope themselves.  Or some older children did it, for those two are pretty small,” and he looked at Margy and Mun Bun, for the motor-boat was now quite near the drifting rowboat.

“All right, Margy!  All right, Mun Bun!  We’ll soon have you back safe!” called Daddy Bunker to them, waving his hands.  Both children were crying.

Up alongside the drifting rowboat went the lobster craft.  Cousin Tom caught hold of the boat in which the children sat, and held it while Daddy Bunker lifted out Margy and her brother.

Then the rowboat was tied fast to the stern of the other boat, which was steered around by Mr. Burnett, and headed up the inlet.

“I’ve got time to take you back to your pier,” he said to Cousin Tom.  “I started out a bit early this morning, so I don’t have to hurry.  Besides, the tide is running pretty strong, and you’d have it a bit hard rowing back.”

“It’s a good thing you came along,” said Daddy Bunker, as he thanked the lobsterman.  “The children might have been carried out to sea.”