When the ladies were alone, Rosalind's talk being still of Orlando, Celia began to perceive her cousin had fallen in love with the handsome young wrestler, and she said to Rosalind, "Is it possible you should fall in love so suddenly?" Rosalind replied, "The duke, my father, loved his father dearly." "But," said Celia, "does it therefore follow that you should love his son dearly? for then I ought to hate him, for my father hated his father; yet I do not hate Orlando."
Frederick being enraged at the sight of sir Rowland de Boys' son, which reminded him of the many friends the banished duke had among the nobility, and having been for some time displeased with his niece, because the people praised her for her virtues, and pitied her for her good father's sake, his malice suddenly broke out against her; and while Celia and Rosalind were talking of Orlando, Frederick entered the room, and with looks full of anger ordered Rosalind instantly to leave the palace, and follow her father into banishment; telling Celia, who in vain pleaded for her, that he had only suffered Rosalind to stay upon her account. "I did not then," said Celia, "entreat you to let her stay; for I was too young at that time to value her; but now that I know her worth, and that we so long have slept together, rose at the same instant, learned, played and eat together, I cannot live out of her company." Frederick replied, "She is too subtle for you; her smoothness, her very silence, and her patience, speak to the people, and they pity her. You are a fool to plead for her, for you will seem more bright and virtuous when she is gone; therefore open not your lips in her favour, for the doom which I have passed upon her is irrevocable."
When Celia found she could not prevail upon her father to let Rosalind remain with her, she generously resolved to accompany her; and, leaving her father's palace that night, she went along with her friend to seek Rosalind's father, the banished duke, in the forest of Arden.
Before they set out, Celia considered that it would be unsafe for two young ladies to travel in the rich clothes they then wore; she therefore proposed that they should disguise their rank by dressing themselves like country maids. Rosalind said it would be a still greater protection if one of them was to be dressed like a man; and so it was quickly agreed on between them, that as Rosalind was the tallest, she should wear the dress of a young countryman, and Celia should be habited like a country lass, and that they should say they were brother and sister, and Rosalind said she would be called Ganimed, and Celia chose the name of Aliena.