Matt was a cartoonist, caricaturist and illustrator. Educated at the Government School of Art in Belfast, he. contributed cartoons to The Magpie, a Belfast satirical magazine, in 1898, and later to its successor Nomad's Weekly. He joined the staff of The Belfast Telegraph, and created the comic strip "The Doings of Larry O'Hooligan" (later drawn by W. H. Conn) for its sports sister paper Ireland's Saturday Night. Just before the First World War he moved to Manchester, where he worked for the Daily Dispatch and Sunday Chronicle as their political cartoonist. He then moved to London, where he drew for the Daily Sketch, The Sketch, the Illustrated Sporting and Dramatic News, The Graphic, the Sunday Graphic, T. P's Weekly, the Evening Standard and other publications. In 1922 a book of his caricatures, Sixty Daily Sketch Cartoons of Famous People as "Matt" Sees Them, was published.