62 



ANCIENT SETTLEMENT ON TREWOETHA MARSH. 



employed to create a suitable current of air. If now we turn to 

 the right at the great entrance, we find ourselves in a hall 20-ft. 

 long, with a row of benches of stone down each side, and on 

 the north side the uppermost seat has granite arms. The seats 



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are formed of upright slabs, eighteen inches high, erected so 

 that their faces shall run paralled with the side-walls, 1-ft. 8-in. 



