He sold the property to another American horseman, A. Kingsley Macomber,[1] whose colt War Cloud won the 1918 Preakness Stakes.
Prior to and during the German occupation of France in World War II the property was left abandoned.
In 1958 the farm was acquired by prominent French horseman Alec Head, a descendant of the trainers who founded the English Racing Colony in Chantilly, Oise.
Alec Head undertook a massive restoration of the facilities and in 1959 brought in the farm's first stallion.
Over the years he and his wife Ghislaine developed Haras du Quesnay into one of the leading stud farms in the country with horses acquired from across Europe and the United States.