 At its peak in 1887-88, the company had more than 113,000 head of cattle and controlled more and one million acres of rangeland across eastern Wyoming and western Nebraska.In 1904 it converted its business from cattle to sheep, peaking in 1911 with 112,000 head.The company began liquidating its holdings in 1945, and it managed just when this property was designated a National Historic Landmark in 1964.