Researchers led by Gordon Noble of the University of Aberdeen returned to a farmer’s field in northeastern Scotland where a hand pin, chain, and spiral bangle all made of silver in the fourth or fifth centuries A.D. had been found more than 170 years ago. According to a report in Live Science, on the second day of the investigation, the team, which had the assistance of metal detectorists, found three Roman silver coins, a silver strap end, a piece of a silver bracelet, and pieces of hack silver. Over a period of 18 months, they gathered a total of 100...