David Crisp,an amateur treasure hunter,found about 52,500 ancient Roman coins in a field in southwestern England.Mr.Crisp used a metal detectorto find the treasure. The coins were buried in a large clay pot that was about 30 centiners deep and that waighed about 160 kilograns.Mr. Ceisp first found several loose coins, but he resisted the temptation to dig up the wole pot.