About the same time that Sturtevant's treatise was published, there appeared a treatise entitled the 'Surveyor's Dialogue,' by one John Norden, the object of which was to make out a case against the iron-works and their being allowed to burn up the timber of the country for fuel.

Yet Norden does not make the number of iron-works much more than a third of Sturtevant's estimate.

He says, "I have heard that there are or lately were in Sussex neere 140 hammers and furnaces for iron, and in it and Surrey adjoining three or four glasse-houses." Even the smaller number stated by Norden, however, shows that Sussex was then regarded as the principal seat of the iron-trade.

Camden vividly describes the noise and bustle of the manufacture--the working of the heavy hammers, which, "beating upon the iron, fill the neighbourhood round about, day and night, with continual noise." These hammers were for the most part worked by the power of water, carefully stored in the artificial "Hammer-ponds" above described.

The hammer-shaft was usually of ash, about 9 feet long, clamped at intervals with iron hoops.