"The Great Bear was said to be Calisto, the beautiful daughter of Lycaon, king of Arcadia. Juno, the wife of Jupiter, was jealous of Calisto, and threatened to destroy her beauty. Fearing that Juno would harm her, Jupiter changed her into a bear.
"'Her arms grow shaggy and deformed with hair,
Her nails are sharpened into pointed claws,
Her hands bear half her weight, and turn to paws;
Her lips, that once could tempt a god, begin
To grow distorted in an ugly grin;
And, lest the supplicating brute might reach
"Calisto had a son named Arcas, who became a great hunter. One day he roused a bear in the chase, and, not knowing that it was his mother, was about to kill her, when Jupiter, taking pity on them both, changed Arcas into the Little Bear."
"Who was Jupiter?" asked Harry.