 He made pioneering airmail, air passenger, and air survey flights, but was unable to make these commercially viable, and in 1924 he sold the New Zealand Flying School assets to the New Zealand Government, and gave up all involvement in aviation.Vivian died in 1950, and Leo in 1951.The Auckland Branch of the Royal Aeronautical Society, concerned to preserve the memory of the brothers' contribution, formed the Walsh Memorial Air Pageant Organisation.