Home / Instruments / View Violins / 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 is every bit a del Gesù in the way it plays. It is brilliant on the E string and dark and turbulent in the bass.