If she had been a singing-bird she would have trilled to the piano; but she had not a note of music.
I stood there dizzy, watching it die while Tweel trilled and whistled.
It trilled with a silvery sweetness and was repeated over and over again.
"But we filled his bottle with luck," trilled the silvery lady upstairs.
She trilled like a thrush, or a linnet, or any bird that ...