The Shepherd Of Nymphs

The nymphs a shepherd took
  To guard their snowy sheep;
He led them down along the brook,
And guided them with pipe and crook,
  Until he fell asleep.
  But when the piping stayed,
  Across the flowery mead
The milk-white nymphs ran out afraid:
O Thyrsis, wake! Your flock has strayed,—
  The nymphs a shepherd need.