Home / A violin by Roger Hansell after The Kemp 1738 by Guarneri del Gesù A violin by Roger Hansell after The Kemp 1738 by Guarneri del Gesù A violin by Roger Hansell after The Kemp 1738 by Guarneri del Gesù Information The 'Kemp', mentioned by the Hills as being ‘rugged and forceful’ in character sounds every bit a del Gesù in the way it plays. It is brilliant on the E string and dark and turbulent in the bass.