Introduction to Songs of Innocence. By Blake, William. Piping down the valleys wild, Piping songs of pleasant glee, On a cloud I saw a child, And he laughing said to me: "Pipe a song about a Lamb!" So I piped with merry cheer. "Piper, pipe that song again;" So I piped: he wept to hear. "Drop thy pipe, thy happy pipe; Sing thy songs of happy cheer!" So I sung the same again, While he wept with joy to hear. "Piper, sit thee down and write In a book, that all may read." So he vanished from my sight, And I plucked a hollow reed, And I made a rural pen, And I stained the water clear, And I wrote my happy songs Every child may joy to hear.