The Golden Retriever is a medium-large gun dog that was bred to retrieve shot waterfowl, such as ducks and upland game birds, during hunting and shooting parties. The Golden Retriever was first developed near Glen Affric in Scotland, at 'Guisachan', the highland estate of Dudley Marjoribanks, 1st Baron Tweedmouth. The breed is thought to have originated from the now-extinct Russian tracker dog. The original cross was of a yellow-coloured retriever, 'Nous', with a Tweed Water Spaniel female dog, 'Belle'. His vision included a more vigorous and powerful dog than previous retrievers, one that would still be gentle and trainable.