Explanatory notes
… furrowed with the drag-comb, etc., planed, sand dressed, ground, polished, chamfered, moulded, turned, ornamented, … mantelpieces; window sills; doorsteps; tombstones; boundary stones and milestones, bollards; panoramic … (including slate) (e.g., for shop window displays), but untreated pebbles, granules, chippings and coloured natural …