Following the pattern established in Part 2 Warfield describes work of economists born in the period 1750-1780. The paper features four men: Saint-Simon, Say, Ricardo and Comte. Only Ricardo is discussed at length. There are short reviews of Saint-Simon & Say and nothing at all on Comte except his name is mentioned. This is one of several unfinished manuscripts or working papers created by Warfield for his ECONOMICS RESEACH studies A printout of the paper is in Econ Research Note-binder No. 6.