The University College of North Wales at Bangor is host to the contenders in the fourth heat.
Ian Barton (university lecturer): Roman emperors of the first and second centuries AD
Anthony Dart (chartered engineer): Strangers and Brothers, novels of C. P. Snow
Liam Fogarty (graduate): Life and works of Gustave Courbet Roger Morris (industrial glove manufacturer): Great Western Railway in the 19th century.
