This photograph is Illustrated on page 701 in Wallace Nutting's 1915 Expansible Catalog and on page 49 of the 1912 Picture Sales catalog.

It was also sold with a reverse image and the title, Not One of The Four-Hundred, # 2604.

Wallace Nutting made several other photographs of this flock of sheep from slightly different angles. They are:
On The Slope, # 312
The life of the Golden Age, # 321
Lambs At Rest, # 1522
Not One of the Four Hundred, # 2604