Sir Dennis Holme Robertson (May 23, 1890-April 21, 1963) was an Englisheconomist who taught at Cambridge and London Universities. He worked closely with John Maynard Keynes in the 1920s and 1930s, during the years when Keynes was developing many of the ideas that later were incorporated in his General Theory of Employment Interest and Money. Keynes wrote that at that time, working with Robertson, it was good to work with someone who had a "completely first class mind". Ultimately however, differences of temperament and views about economic theory and practice led to some estrangement between the two men.
Denis was born in Paris, presumably in the 1640's.
Denis is said to have studied medicine at Montpellier (1), but no records of his inscription as a medical student or of the conferring upon him of a diploma as doctor in medicine can be found in the very complete archives of the Faculty of Medicine.
Denis brought the case before the court, and a judgment tendered on 17 April 1668 cleared him of any wrongdoing but forbade the practice of transfusion of blood in man without permission of the Paris Faculty of Medicine.