Mahonoy City. Pa.,Feb. 11. - Yesterday, while the school children of the New Boston school house, located neqp the New Boston breaker which was burned down Monday night, were congrejcated around the ruins, the chimuey toppled over, falling upon and instantly killing Maggie Boyce and injuring, perhaps fatally, Tillie Cragg and internally injuring John Young. The children's ages ranged from 10 to 12 years.