As much wealth was gained by the pursuit of the revived iron manufacture in Sussex, iron-mills rapidly extended over the ore-yielding district. The landed proprietors entered with zeal into this new branch of industry, and when wood ran short, they did not hesitate to sacrifice their ancestral oaks to provide fuel for the furnaces. Mr. Lower says even the most ancient families, such as the Nevilles, Howards, Percys, Stanleys, Montagues, Pelhams, Ashburnhams, Sidneys, Sackvilles, Dacres, and Finches, prosecuted the manufacture with all the apparent ardour of Birmingham and Wolverhampton men in modern times. William Penn, the courtier Quaker, had iron-furnaces at Hawkhurst and other places in Sussex. The ruins of the Ashburnham forge, situated a few miles to the north-east of Battle, still serve to indicate the extent of the manufacture. At the upper part of the valley in which the works were situated, an artificial lake was formed by constructing an embankment across the watercourse descending from the higher ground,[9] and thus a sufficient fall of water was procured for the purpose of blowing the furnaces, the site of which is still marked by surrounding mounds of iron cinders and charcoal waste. Three quarters of a mile lower down the valley stood the forge, also provided with water-power for working the hammer; and some of the old buildings are still standing, among others the boring-house, of small size, now used as an ordinary labourer's cottage, where the guns were bored. The machine was a mere upright drill worked by the water-wheel, which was only eighteen inches across the breast. The property belonged, as it still does, to the Ashburnham family, who are said to have derived great wealth from the manufacture of guns at their works, which were among the last carried on in Sussex. The Ashburnham iron was distinguished for its toughness, and was said to be equal to the best Spanish or Swedish iron. Many new men also became enriched, and founded county families; the Fuller family frankly avowing their origin in the singular motto of Carbone et forcipibus--literally, by charcoal and tongs.[10]