Painter, sculptor, printmaker and teacher, born at Oystermouth, Swansea. He attended Cheltenham School of Art, 1921-4, and Royal College of Art, 1924-8, being a Royal College of Art Scholar, 1928-9. Taught at Colchester School of Art, 1929-31, then after art school appointments in Hull and Derby was principal at Lydney and High Wycombe Schools of Art, finally until retirement at Cardiff, painting, sculpting and making prints until his sight failed. Tarr won first prizes for landscape and portrait at the 1930 Royal National Eisteddfod, adding the first prize for landsape at the 1932 Eisteddfod. Group exhibitions included RA Summer Exhibitions, SEA, SWG, WAC and in London and other provincial galleries. Tarr believed that every child had the potential to be good at something, and his unrealised ambition was to found a student assessment centre.