Note 238 — Chapter XV · Watt again visits Cornwall—Invention of the Rotary Motion—The Patent Right again assailed.

One of the pleasantest events that occurred to Watt in the course of his stay in Cornwall, was the visit of Wedgwood, who had come to inspect some of the mines in which, on Boulton’s recommendation, he had taken an interest, and at the same time to search for clays for use in his earthenware and porcelain manufacture at Etruria. “Mr. Wedgwood,” he wrote Boulton, “has been in this country some days hunting clays and soap rocks, cobalts, &c. I have had two visits of him at the expense of a day and a half. Nevertheless I don’t grudge that, as I am glad to see a Christian. He has just left me.”—Watt to Boulton, 18th October, 1781.