Adrodd fel Amhriodol
Testun Gwreiddiol (Anodiad: EPW062064 / 545075)
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The River Mimram or Maran. The river's valley was the reason the Digswell railway viaduct was built. The river is a tributary of the River Lea, rising in the chalky uplands near Whitwell, flowing through Welwyn village and joining the Lea at Hertford. '