Mahony's work was accepted by The Bulletin and he became known for his excellent drawings of horses. He also worked for The Antipodean, The Sydney Mail and the Australian Town and Country Journal. In addition to his periodical work, he illustrated numerous books, including Where the Dead Men Lie, and Other Poems by Barcroft Boake, While the Billy Boils by Henry Lawson and Dot and the Kangaroo, a children's book by Ethel Pedley.Dot and the kangaroo – About This Book at www.childrenslibrary.org
