b'John Ibson explains some of the detail to Kate Pratt. This photograph shows the overall dimensions of the mosaic in its setting.A cunning aspect of the original mosaic can be seen here - although there are four horses in all, only 12 legs are depicted in order to simplify the design. Also, the wheels of the chariot are intentionally omitted.The mosaic, it should be noted, comprises the central scene plus a surrounding linear circle anda three-stranded decoration (called a guilloche).The head harness of each horse is shown andJohn holds some ofthe mosaic pieces he made. between their ears is a plume.324 BULLETIN 17'