"Iris was the Herald of the Gods, and the rainbow was constructed on purpose to serve her for a way from Heaven to the Earth." "Mathematicians do not allow that," said the girl, smiling.
"I don't know any mathematics.

But now I understand in what school you learned your heraldry.

You are Queen-at-Arms at least, and Herald to the Gods of Olympus." He wished to add something about the loveliness of Aphrodite, and the wisdom of Athene, but he refrained, which was in good taste.
"Thank you, Mr.Arbuthnot," Iris replied.

"I learned my heraldry of my grandfather, who taught himself from the books he sells.

And my mathematics I learned of Lala Roy, who is our lodger, and a learned Hindoo gentleman.