This was written to the tune of an old gaelic song (The Mist-covered mountain).
The chords are Am G Am C G Am G Am throughout the whole song.

Chorus:
Am
Hush, Hush it's time to be sleeping
G
Hush, Hush dreams come a-creeping
Am     G  C         G 
Dreams of peace and freedom
   Am            G           Am
So smile in your sleep bonny baby

Verse:
Am
Once our Valleys were ringing
         G
With the sounds of our children singing
Am  G     C            G
Now sheep bleat in the evening
        Am              G         Am
And the sheilings stand empty and broken

Chorus

Verse:
Where stands our proud highland mettle?
Our men once so feared in battle
But now they stand huddled like cattle
Soon to be shipped o'er the ocean

Chorus

Verse:
We stood with our heads bowed in prayer
While factors lay our cottages bare
Flames fire clear mountain air
And many were dead in the morning

Chorus

Verse:
No use pleading or praying
Now gone, gone all hopes of staying
So hush now anchors away
Don't cry in your sleep bonny baby

来源：www.ultimate-guitar.com