Aw, I thought we had something, LWY, but it's not this "Clouds." This one is from Music Now and Long Ago the 1956 Silver Burdett third-grade songbook.

CLOUDS
(poem by Christina Rossetti, music by Hoagy Carmichael)

White sheep, white sheep,
High on a windy hill,
When the wind stops,
You all stand still.
When the wind blows,
You walk away slow.
Oh, white sheep, white sheep,
Where did you go?


Nice song, though...
The same song is in the fourth grade book of the Silver Burdett Centennial Edition.