Which figure was instrumental in formalizing the breed starting around 1860 and differentiating it from a close relative?

Answer

Mr. Sewallis Evelyn Shirley

Mr. Sewallis Evelyn Shirley, who founded The Kennel Club of Britain, took a keen interest in the emerging dog and sought to establish clear characteristics to distinguish it from the Curly-Coated Retriever.

Which figure was instrumental in formalizing the breed starting around 1860 and differentiating it from a close relative?
Dogbreedlineagecoatretriever