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mae'r gwir bryder sydd gennyf yn ymwneud nid yn unig â'r hyn a ddigwyddodd , ond â'r ffordd ddirgelaidd y digwyddodd : y syniad na fyddem yn sylwi ar yr hyn a ddigwyddodd os câi'r dŵr ei ollwng yn y nos
my real concern is not just what has happened , but the cloak and dagger way in which it happened : the idea that if the water was let out at night , we would not notice that it had happened