[3] Later on, Arthur III disputed with Ogden Phipps, Charles Kenney, and William Haggin Perry, who made up an advisory committee created by "Bull" Hancock to choose his successor.

[4][5] Subsequently, Arthur III moved on to Stone Farm, forcing Seth to manage Claiborne all by himself.

By this point in time, Secretariat won numerous races as a 2-year-old, and was already named the American Horse of the Year.

His successor, Penny Chenery, was forced to sell the horse by way of a breeding syndicate in order to pay off her father's inheritance tax.

The Cheneries had known the Hancocks since their grandfather's generation, and this led to Penny asking Seth to set up the horse's breeding syndicate.