Charles A. Beard,
An Economic Interpretation of the Constitution of the United States…
(1913)
“ A French report to the Ministry of Foreign Affairs on the Congress of 1788 speaks of John Langdon as a man of great wealth and pressing commercial interests: "M.L. a fait une grande fortune dans le commerce, c' est le Rob. Morris de son Etat, faisant une grande dépense et s'attachant beau coup de citoyens par ses libéralités." [160] John Langdon-Elwyn, grandson of John Langdon, in whose family were preserved the valuable private papers of the elder Langdon, wrote, sometime in the early part of the nineteenth century, a pamphlet on his celebrated grandfather. ”
