Blackgranryup is marked as a castle on Blaeu’s mid-17th century map but I can’t find a description of the location so for now I have placed it on the south edge of Blackgrain Rig.
Black-grain; Blackgrain Rig
Blackgranyrup is in the parish of Yarrow and the county of Selkirkshire.
Grid reference: NT 33540 28400
Lat / long: 55.5447608634816, -3.0548143312698
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