Sundown was conceived when a Radium bred daughter Jane was mated “when the sun had gone down”, to the leading Australian thoroughbred sire of the time Midstream, at Kio Ora Stud, Scone. The influence of Sundown has been extensive especially in polo and polocrosse circles. The Haydon stud has used his bloodline through his daughter, the Bloomfield mare Sunshower (refer Sunshower family), dam of Haydon Sunbeam, Haydon Sun Gun and Haydon Easy Sun. With 110 registered progeny, Sundown’s influence is notable with horses like Edenhope Lilly (dam of Endehope Sam), Springfield Majestic, Huntley Sunstream, Bandora, etc. Interestingly, Midstream’s sire, Blandford, features in Young Valais pedigree.