Thanks for your comments and help Q.

Cowboy's Wild Song to His Herd was printed in 1912 book, Rhymes from the Rangeland by Wesley Beggs:

http://books.google.com/books?id=qbQPAAAAYAAJ&pg=PA110&dq=Cowboy%27s+Wild+Song+to+His+Herd:&ie=ISO-8859-1&output=html

This is a rewrite by the Carter's.

COWBOY'S WILD SONG TO HIS HERD- Carter family

One beautiful night when the moon was full
And the air was crisp and clear
A cowboy lay on the starlit plain
And thought of his home so dear
         [INSTRUMENTAL BREAK]

He thought of his mother he loved so well
And the slumber of sleep was buried
Not a sound to be heard but those of the night
As he sang a wild song to his herd
         [INSTRUMENTAL BREAK]

The cattle are lying so quiet and still
On the carpet that mantles the west
While the golden links from the sky at night
Brings peace to the cowboy's breast
         [INSTRUMENTAL BREAK]

Still he thinks of his mother in a faraway land
And his thoughts by memory was stirred
And he sees himself to the old home again
As he sings a wild song to his herd
         [INSTRUMENTAL BREAK]

He's far from the din of the city noise
Where the links of folly do shine
He's far from the brawls of the dives of sin
And the flow of the sparkling wine
         [INSTRUMENTAL BREAK]

He's in the great west with its mantle of green
Where his neighbors say never a word
A land of mirages, mountains and plains
Where the cowboy sings low to his herd