Last Updated: Thursday, 11 March, 2004, 11:45 GMT Roman treasure found in pond dig The coins are thought to date from the 4th century A man unearthed a priceless hoard of 20,000 Roman coins as he dug a new fishpond in his back garden. Experts say the money may date from the 4th Century and could be the biggest find of its kind in Britain. The coins were crammed into a ceramic pot which broke up as it was dug out of the ground at Thornbury, Gloucestershire. Now a coroner must decide if Ken Allen, who made the discovery, can...