The Sussex Spaniel reportedly originated on the Rosehill Park estate in Brightling, Sussex County, England, in the 1850s. Augustus Elliot Fuller, the owner of Rosehill, is credited with developing the breed as a field dog built to easily penetrate dense brush and flush game. It is thought that Fuller crossed a variety of spaniel breeds, including the Springer, with hounds to create the Sussex. In 1882, Moses Woolland became involved with the breed and within a few years his Sussex Spaniels were dominating the English show ring. He also bred and showed Field Spaniels under the kennel name Bridford. Another key person in the history of the Sussex Spaniel is Campbell Newington, who obtained his first Sussex in 1887 and adopted the kennel prefix Rosehill. Together, Newington and Woolland refined the Sussex Spaniel and achieved unparalleled consistency in quality and type. In 1909, another gentleman, J. E. Kerr, started showing and breeding Sussex Spaniels at Harviestoun Castle in Scotland, where he also was known for his Shetland ponies and Cairn Terriers.