An engine lathe which he introduced greatly forwarded his designs; and the wareroom opened in London for the exhibition of his now famous Queen's ware, Etruscan vases, and other works, drew attention to the excellence of his work. He started works besides at Chelsea, supervised by his partner Bentley, where modellers, enamellers, and artists were employed, so that the cares of his business, 'pot-making and navigating'--the latter the carrying through of the Grand Trunk Canal--entirely filled his mind and time at this period. So busy was he, that he sometimes wondered whether he was an engineer, a landowner, or a potter. Meanwhile, a step he had no cause to regret was his marriage in 1764 to Sarah Wedgwood, no relation of his own, a handsome lady of good education and of some fortune. Wedgwood had begun to imitate the classic works of the Greeks found in public and private collections, and produced his unglazed black porcelain, which he named Basaltes, in 1766. The demand for his vases at this time was so great that he could have sold fifty or one hundred pounds' worth a day, if he had been able to produce them fast enough. He was now patronised by royalty, by the Empress of Russia, and the nobility generally. A large service for Queen Charlotte took three years to execute, as part of the commission consisted in painting on the ware, in black enamel, about twelve hundred views of palaces, seats of the nobility, and remarkable places. A service for the Empress of Russia took eight years to complete. It consisted of nine hundred and fifty-two pieces, of which the cost was believed to have been three thousand pounds, although this scarcely paid Wedgwood's working expenses.