PRETTY COW 
  Thank you, pretty cow, that made   Pleasant milk to soak my bread,   Every day and every night,   Warm, and fresh, and sweet, and white 
  Do not chew the hemlock rank,   Growing on the weedy bank;   But the yellow cowslips eat,   That will make it very sweet.
  Where the purple violet grows,   Where the bubbling water flows,   Where the grass is fresh and fine,   Pretty cow, go there and dine.
JANE TAYLOR