"
"What is the curtain? Is _that_ the light?"
"Now you are coming pretty near it, Daisy," said the doctor. "The
curtain, as I call it, is not light, but it is what the light comes
from."
"Then what _is_ it, Dr. Sandford?"
"That has puzzled people wiser than you and I, Daisy. However, I think I
may venture to say, that it is something like an ocean of flame,
surrounding the dark body of the sun."
"And there are holes in it?"
"Sometimes."
"But they must be very large holes to be seen from this distance?"
"Very," said the doctor. "A great many times bigger than our whole
earth."
"Then how do you know but they are dark islands in the ocean?"
"For several reasons," said the doctor looking gravely funny; "one of
which reasons is, that we can see the deep ragged edges of the holes,
and that these edges join together again."
"But there could not be holes in _our_ ocean?" said Daisy.
Dr. Sandford gave a good long grave look at her, set aside his empty
plate which had held raspberries, and took a chair. He talked to her now
with serious quiet earnest, as if she had been a much older person.
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