Minnie and Winnie

Minnie and Winnie
      Slept in a shell.
  Sleep, little ladies!
      And they slept well.

Pink was the shell within,
      Silver without;
  Sounds of the great sea
      Wandered about.

Sleep little ladies!
      Wake not soon!
  Echo on echo
      Dies to the moon.

Two bright stars
      Peep’d into the shell,
  What are they dreaming of?
      Who can tell?

Started a green linnet
      Out of the croft;
  Wake, little ladies,
      The sun is aloft!

Lord Tennyson.