A metal detectorist who made one of Britain’s most important Iron Age discoveries is hosting a session for children at Harborough Museum later this month. Ken Wallace, who made the initial find of the Hallaton Treasure, the largest hoard of British Iron Age coins, in a field in 2000, is hosting an event at the museum entitled ‘Discovering the Hallaton Treasure.’ Metal detectorist Ken Wallace, who initially discovered the Hallaton Treasure, is hosting a session for children at Harborough Museum later this month