Page:Devonshire Characters and Strange Events.djvu/717

Rh That may be rendered thus:—

He who wrote this was P. Virgilius Maro, and Bathylus became the laughing-stock of Rome. I tell this story because up to a certain point it illustrates the fortunes of William Cookworthy. At the present day many hundreds of men live in ease and happiness through the discovery of china-clay by Cookworthy, but he himself reaped no advantage by what he discovered. The town of St. Austell in Cornwall may be said to live on china-clay that is exported to the Staffordshire potteries. Before the discovery by Cookworthy, it was not known that the kaolin, the essential ingredient of porcelain, was to be found anywhere, except in China. But Cookworthy, who has put bread into the mouths of thousands, who created the manufacture of porcelain in England out of home-produced kaolin, reaped not a penny advantage from his discovery. Kaolin is found elsewhere, in Devon, on the fringe of Dartmoor. Now, the visitor to Plymouth, as he passes by the head of the Laira, will see a milk-white stream flow past the line. It is the overflow from the kaolin works at Lee Moor. Cookworthy did not, however, discover the china-clay on the borders of Dartmoor, where it abounds. China-clay or kaolin is obtained from highly decomposed granite, and consists of the disintegrated and metamorphosed felspar of that rock. Often on the outskirts of the granitic masses of Cornwall the rock is so decomposed by the percolation of rain-water holding carbonic acid in solution that the granite may be dug