The general health of Wedgwood suffered so much between 1767 and 1768 that he decided to have the limb which had troubled him since his boyhood amputated. He sat, and without wincing, witnessed the surgeons cut off his right leg, for there were then no anæsthetics. 'Mr Wedgwood has this day had his leg taken off,' wrote one of the Burslem clerks at the foot of a London invoice, 'and is as well as can be expected after such an execution.' His wife was his good angel when recovering, and acted as hands and feet and secretary to him; while his partner Bentley (formerly a Liverpool merchant) and Dr Darwin were also kind; and he was almost oppressed with the inquiries of many noble and distinguished persons during convalescence. He had to be content with a wooden leg now. 'Send me,' he wrote to his brother in London, 'by the next wagon a spare leg, which you will find, I believe, in the closet.' He lived to wear out a succession of wooden legs. Indifference and idleness he could not tolerate, and his fine artistic sense was offended by any bit of imperfect work. In going through his works, he would lift the stick upon which he leaned and smash the offending article, saying, 'This won't do for Josiah Wedgwood.' All the while he had a keen insight into the character of his workmen, although he used to say that he had everything to teach them, even to the making of a table plate. He was no monopolist, and the only patent he ever took out was for the discovery of the lost art of burning in colours, as in the Etruscan vases. 'Let us make all the good, fine, and new things we can,' he said to Bentley once; 'and so far from being afraid of other people getting our patterns, we should glory in it, and throw out all the hints we can, and if possible, have all the artists in Europe working after our models.' By this means he hoped to secure the goodwill of his best customers and of the public. At the same time he never sacrificed excellence to cheapness. As the sale of painted Etruscan ware declined, his Jasper porcelain--so called from its resemblance to the stone of that name--became popular. The secret of its manufacture was kept for many years. It was composed of flint, potter's clay, carbonate of barytes, and _terra ponderosa_. This and the Jasper-dip are in several tones and hues of blue; also yellow, lilac, and green. He called in the good genius of Flaxman in 1775; and, for the following twelve years, the afterwards famous sculptor did an immense amount of work and enhanced his own and his patron's reputation. Flaxman did some of his finest work in this Jasper porcelain. Some of Flaxman's designs Wedgwood could scarcely be prevailed upon to part with. A bas-relief of the 'Apotheosis of Homer' went for seven hundred and thirty-five pounds at the sale of his partner Bentley; and the 'Sacrifice to Hymen,' a tablet in blue and white Jasper (1787), brought four hundred and fifteen pounds. The first named is now in the collection of Lord Tweedmouth.