1From Benjamin Franklin to Ingenhousz, 24 December 1783 (Franklin Papers)
ALS : Yale University Library I am greatly indebted to you for Letters. I shall write largely to...
2From Benjamin Franklin to Ingenhousz, 16 January 1784 (Franklin Papers)
ALS : New York Public Library; copy: Library of Congress I have this Day received your Favour of...
3From Benjamin Franklin to Jan Ingenhousz, 23 April 1784 (Franklin Papers)
ALS : Myron Kaller & Associates, Inc., Asbury Park, New Jersey (1989) I did intend to have...
4[From Thomas Jefferson to Jan Ingenhousz, 14 July 1785] (Jefferson Papers)
[ Paris, 14 July 1785. Entry in SJL reads: “Monsr. Ingenhausz medecin de la cour & c. & c. à...
5From Thomas Jefferson to Jan Ingenhousz, 14 July 1785 (Jefferson Papers)
Doctor Franklin left us two days ago. On his departure he charged me with the inclosed packet to...
6From Thomas Jefferson to Jan Ingenhousz, 9 July 1787 (Jefferson Papers)
An absence of three or four months on a journey through the Southern parts of France and Northern...
7From Thomas Jefferson to Jan Ingenhousz, 19 June 1788 (Jefferson Papers)
I am late in answering your favor of Jan. 23. but it has not been possible for me to do it sooner...