 His grandfather was James Windmill Porter (c. 1850–1918), pioneer of top-dressing with superphosphates; a great-grandfather was Patrick Gay, of Gay's Arcade fame.He grew up with his parents on Edwin Terrace, Gilberton and was educated at St. Peter's College.Porter was for a time the manager of Childerley Park Station, Naracoorte, then served as a lieutenant in the 2nd AIF, promoted to major.