ELD4905830 View of the rue Quincampoix with the speculators at the time of the system of John Law, Scottish economist, developed between 1716 and 1720 in Paris. 19th century (engraving); Private Collection; (add.info.: Economic system: the speculative bubble at the time of the Law system, the agiotors of Rue Quincampoix - Under Louis XV, some brokers set up on Rue Quincampoix, under the name of bankers, to trade public papers and make prices play upward or down for their profits, around 1720.); Photo by The Holbarn Archive.