LONDON.- Bonhams will sell 140 snuff bottles from the unique Bloch Collection in Hong Kong on May 28th. This Collection is the World’s largest and finest in private hands, comprising 1720 exceptional examples of these Chinese ‘miniature masterworks’. The auction includes an Imperial enamel-on-copper snuff bottle personally commissioned by the Qianlong Emperor for his own use in the Forbidden City in Beijing. This stunning object is estimated to sell for £250,000 and is one of the finest and rarest examples of this highly regarded Chinese art form ever to be offered at auction. The habit of using ground tobacco (snuff) was introduced to Asia by 17th century Western travellers from Europe, where it was an exotic import from the Americas. Chinese snuff takers found that traditional Western