Petty’s writings are rarities of the bookseller’s trade and are to be found only in scattered poor old editions, which is the more surprising since William Petty was not only the father of English Political Economy, but also the ancestor of Henry Petty, alias Marquis of Lansdowne, the nestor of the English Whigs. However, the Lansdowne family could hardly bring out a complete edition of Petty’s works without prefacing it with his biography, and what can be said of most origins of the great Whig families holds good also in this case, viz., “the less said of them the better.” The keen-witted but cynical army surgeon who was as ready to plunder in Ireland under the shield of Cromwell as to crawl before Charles II. to get the title of baron which he needed for his plunderings, is a model hardly fit for public exhibition. Besides that, Petty seeks to prove in most of his writings which he published in his lifetime, that England’s prosperity reached its climax under Charles II., a heterodox view for the hereditary exploiters of the “glorious revolution.”