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    Manylion
    Hierarchaeth
    Safleoedd Cysylltiedig
    Rhif Archif
    6374123
    Disgrifiad
    Map showing 'Situation of stone blocks at Pwll Du': Figure 51.
    Enw Casgliad
    ELR - Early Limestone Railways Drawings
    Cyfrwng
    Cartographic.
    Cychwynnwr
    Michael Blackmore, John Van Laun