(He and his shadow dance together. He is showing off now. He crows like a cock. He would fly in order to impress WENDY further if he knew that there is anything unusual in that.)

PETER: Wendy, look, look; oh the cleverness of me!

J. M. Barrie (1860-1937) Scottish novelist and dramatist [James Matthew Barrie]

Peter Pan, Act 1 (1904, pub. 1928)
    (Source)

In Barrie's 1911 novelization, Peter and Wendy, ch. 3 "Come Away, Come Away!" this is rendered:

Alas, he had already forgotten that he owed his bliss to Wendy. He thought he had attached the shadow himself. “How clever I am!” he crowed rapturously, “oh, the cleverness of me!”