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The Poltross Burn is a tributary of the River Irthing. The burn rises on Denton Fell and flows north-east, joining the Irthing at Gilsland. The well preserved Roman Milecastle 48, known locally as The King's Stables, stands on the west bank. A 19th-century watermill within the village used the burn as a source of power to grind corn.
References
Poltross Burn Wikipedia(Text) CC BY-SA