Cookridge Hall and estate had belonged to the Kirke family, it was sold in 1722, the new owner being Edmund Sheffield of Normanby, Lincolnshire. It was purchased by his mother Catherine, third wife of the Duke of Buckingham and Normanby. Edmund is thought to have visited the estate in 1725, he died of consumption (T.B.) in Rome 10 years later. He was the last of the direct Sheffield line, but an illegitimate son of the Duke had been named heir in 1721, having taken the name Sheffield under the Dukes will. This was Charles Herbert Sheffield. The Duchess contested this until her death in 1743. Cookridge Hall remained in the Sheffield family for almost a hundred years.