Says Maurice Cass: The Fowler ploughing engine had an underslung wheel onto which was wound a steel rope. The ends of the rope were attached to the plough. There was a considerable build up of lime in the soil. The lime was added to reduce the unpleasant smells from the sewage which was heavily overburdened with Brewery Waste. Basically hydrogen sulphide and organic sulphides were present causing residents of Etwall, in particular, to complain. It was the subject of a public enquiry in 1910, which drew on a number of scientific minds proposing different solutions. I think it was Doctor Barwise (a landowner whose land was subject to the compulsory purchase order), and Professor Sir James Dewar (of Thermos Flask fame) who led the argument for biological treatment, which was cast aside in favour of broad irrigation and lime treatment.