Roman Quadriga. The chariot is racing along the spina in the centre of the circus on one of its seven laps; the driver is about to turn left-handed round the turning-posts. His reins are Y-shaped, the two ends meeting at the withers. The charioteer thus holds a single rein for each horse, whose head he cannot turn. The reins are wrapped round his waist so that he can slow or stop his team by leaning back. The History of Horse Racing by Roger Longrigg, page 14. *** Local Caption ***