"Yes," said Mr. George.

"And how blue the water is!" continued Rollo.

"Yes," said Mr. George. "The water of the streams which come from the Swiss mountains is turbid at first and very gray from the grinding up of the rocks in the moraines and glaciers and by the avalanches."

"What is a moraine?" asked Rollo.

"I will explain it to you one of these days," said Mr. George, "when you come to see one."

"And a glacier," said Rollo; "what is that?"

"I will explain that to you, too, some other time," said Mr. George, "but not now; for the breakfast will come in in a minute or two."

"Well," said Rollo, "I can hear while I am eating my breakfast."

"That may be," replied Mr. George; "but I cannot lecture very well while I am eating my breakfast."

Rollo laughed. "I did not think of that," said he.