There is also a welltrodden connection between the analysis of representation and signs and the analysis of wealth: Quesnay the physiocrat wrote the article on vidence' for the Encyclop die; Condillac and Destutt included in their theory of knowledge and language that of trade and economics, which for them possessed political and also moral value; it is well known that Turgot wrote the article on tymologie' for the Encyclop die and the first systematic parallel between money and words