oat, sailing out into the ocean. Just think, Rose! We've
never been away out at sea before."

"There was lots of ocean at Captain Ben's," said the girl. "I suppose
the ocean is all the same everywhere. Just water. I hope it stays flat."

"Stays flat?" repeated Russ, opening his eyes very wide.

"Yes," said Rose gravely. "I don't like water when it's bumpy. It makes
me feel funny in my stomach when it's that way."

"Oh! It won't be rough," said Russ, with much assurance. "I heard Daddy
say we were going to sail into summer seas. And that must be warm and
pleasant water. Don't you think so?"

Rose was looking over the rail now. She pointed.

"That doesn't look as though the water was warm," she cried. "See the
lumps of ice, Russ? It must be ice water. Where do you suppose the
summer seas are?"

"We are going to them," declared her brother with confidence. "Daddy
said so. He said we would go out to a place he called the Gulf Stream
and that the water would be warm there and the air would be warmer,
too."

"What do you think of that?" gasped Rose. "A stream in an ocean? I guess
he was joking."

"Oh, no, he wasn't. He said it real serious. He told Aunt Jo about it."

"But how can a stream--that means a river--be running in the ocean?
There wouldn't be any banks!" declared the doubtful Rose.

"Let's go and ask him about it," suggested Russ. "And we'll want to keep
on the lookout for that Gulf Stream too. I wouldn't want to go past it
without seeing it."

They were just about to hunt for Daddy Bunker in the crowd on deck when
Laddie came running to them. He was very much excited and he could
hardly speak when he reached his older brother and sister.

"Oh! Oh! Oh!" gasped the smaller boy.

"What is the matter, Laddie?" demanded Russ.

"If it is another riddle, Laddie, take your time. We'll stop and listen
to it."

"It isn't a riddle--Yes, it is, too! I guess it's a sort of riddle,
anyway," said Laddie. "Have you seen him?"

"That sounds like a riddle," said Rose. "And of course we haven't seen
him. What is the answer?"

"Who is it that you are asking your riddle about?" demanded Russ.

"Mun Bun," declared Laddie, breathing very hard, for he had run all the
way from the stateroom.

"Mun Bun isn't a riddle," said his sister. "He can't be."

"Well, he's lost," declared Laddie. "We can't find him. He was there one
minute, and just the next he was gone. And Mother can't find him, and
Vi's gone to hunt for