CHAPTER XIX.--THE IRON ORES USED IN GAIRLOCH.

References to local iron ore--Local bog iron used at ancient bloomeries--Ferruginous rocks and shales--Traditional quarries--Richness of bog iron--Places where it is still found in Gairloch--Bog iron originally used by Sir George Hay--He afterwards imported red hematite and clayband ironstone--Mr Marr's description of these ores--They were landed at Poolewe--Remains of them there--Mr Macadam's analyses--Mixture with local ore--Classification of the ores 86