David Jeffries
London: E. Lumley, No date.

In which their importance is considered; and plain rules are exhibited for ascertaining the value of both; also the true method of manufacturing diamonds. First published in 1750, being “the first book in English to describe how diamonds and pearls can be evaluated on the basis of the factors of size (or weight) and style of cut”. This edition, while stated as the Fourth Edition, is produced by the London bookseller Edward Lumley sometime in the 19th century, and differs from the fourth edition of 1871 “While resembling the 4th edition, it has been prepared by a different publisher and the contents are drastically re-arranged. The explanation of technical terms omitted in the previous edition (despite its claim to completeness!) is here restored.” SINKANKAS 3203. Though given the career of Lumley it is likely this edition was published prior to the 1871 fourth edition.