Wilson Mine, Mid Lincoln Ironstone Mines, Greetwell. Looking N. Lincolnshire Limestone overlying Northampton Ironstone, Greetwell. The limestone, part of the Inferior Oolite, shows light in the photograph; the ironstone, containing about 33 per cent iron as mined, is dark’. BGS Ref: P206247 Long Harry Mine, Mid Lincoln Ironstone Mines, Greetwell. Looking N. Lincolnshire Limestone overlying Northampton Ironstone, Greetwell. Similar section to last (P206247). Trucks leaving the Long Harry Mine, laden with ironstone. BGS Ref; P206248 Long Harry Mine, Mid Lincoln Ironstone Mines, Greetwell. Looking N. Lincolnshire Limestone overlying Northampton Ironstone, Greetwell. The view shows disused adits of Long Harry Mine. BGS Ref; P206249 Long Harry Mine, Mid Lincoln Ironstone Mines, Greetwell. Looking N. Lincolnshire Limestone overlying Northampton Ironstone, Greetwell. The picture shows men working out the ironstone at the quarry-face, Long Harry Mine. BGS Ref; P206250
