"So there is," said his father; "I am rather sorry to see that."

"Sorry, father! why? It is beautiful, I think."

"It does look pretty, but it is a sign of rain to-morrow."

"Of rain? O no, father; it is a kind of a rainbow. It is a round
rainbow. I am sure it will be pleasant to-morrow."

"Very well," said his father, "we shall see in the morning." Then he sat
down on Rollo's bed-side some time, talking with him on various
subjects, and then heard him say his prayers. At length he took the
light, and bade Rollo good night.

Rollo's eye caught another view of the moon as his father was going,
and he said,

"O, father, just look at the moon once more; that _is_ a rainbow; I see
the colors. I expect it will grow into a large one, such as you told me
was a sign of fair weather. I will watch it."

"Yes," said his father, "you can watch it as you go to sleep."

So Rollo laid his face upon his pillow in such a way that he could see
the moon through the window; and he began to watch the bright circle
around it, but before it grew any bigger, he was fast asleep.