"You know we got up early this morning," Russ said to his sister, "and
we have been awful busy. And here it is noontime. Mun Bun doesn't
usually have a nap until after lunch, but I guess he's gone somewhere
and hidden away and gone to sleep. And when Mun Bun's asleep it is awful
hard to wake him. You know that, Rose Bunker."

"Yes, I know it," admitted Rose. "But where could he have gone?"

Russ thought over that question pretty hard. Daddy Bunker would have
said that the little lost boy's older brother was trying to put himself
in Mun Bun's place and thinking Mun Bun's thoughts.

Now, if Mun Bun had been very sleepy and had crept away to take a nap,
as he often did after lunch when they were at home, without saying
anything to Mother Bunker about it, where would he have gone to take
that nap on this steamboat?

Mun Bun was a bold little boy. He was seldom afraid of anything or
anybody. Had he not instantly made friends with Sam, the strange
colored boy, at Aunt Jo's house? So Russ knew he would not be afraid to
run right out on the deck among the other passengers.

"But that would not be a nice place to go for a nap," said Russ aloud.

"What wouldn't?" asked Rose, quite surprised by her brother's sudden
speech.

"Out here on the deck. No, he didn't come out here at all," said Russ,
with confidence.