1. Walter A. Staehelin, The Book of Porcelain: The Manufacture, Transport, and Sale of Export Porcelain in China during the Eighteenth Century, trans. from the German by Michael Bullock (London: Lund Humphries, 1966). 2. Published in English in 1725, in Jean-Baptiste Du Halde’s General History of China, according to Ann Finer and George Savage, eds., The Selected Letters of Josiah Wedgwood (London: Cory, Adams and McKay, 1965), p. 162. 3. Frank B. Lenz, “The World’s Ancient Porcelain Center,” National Geographic Magazine 38 (November 1920): 391–406.