W. S. Lindsay, History of Merchant Shipping and Ancient Commerce… (1874)
“ The Americans are now rapidly developing their large natural resources of iron. “The iron ores of the United States” (London Times, 28th of May, 1875) , “are plentiful and various, though some kinds are wanting; thus the ‘spathose’ or spar-like iron ore, scarce even in Europe, is very rare; and the ironstone of the liassic and oolite seams, which furnishes about one-third of our British pig-iron, appears to be wholly absent. On the other hand, the specular iron ore, the brown and red hematites, the clay and blackband ironstones, are good and abundant ”
