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    Manylion
    Hierarchaeth
    Safleoedd Cysylltiedig
    Rhif Archif
    6013448
    Disgrifiad
    RCAHMW drawing (ink on paper) showing plan of Bryn Mair early field systems, Betws Garmon. Published in Caerns Inventory Vol II, fig 36.
    Enw Casgliad
    Drawings Collection
    Cyfrwng
    Graphic.
    Cychwynnwr
    RCAHMW