1To Thomas Jefferson from Robert Livingston, 26 January 1799 (Jefferson Papers)
...union, than in the invention of the steam engine. Which at once subjects the most powerful...
2To Thomas Jefferson from Robert R. Livingston, 4 June 1800 (Jefferson Papers)
...is the sketch of a Steam engine which certainly avoids many of the inconveniences of Docr...
3Enclosure: Description of a Steam Engine, 4 June 1800 (Jefferson Papers)
Description of a Steam Engine
4To James Madison from Robert R. Livingston, 13 June 1801 (Madison Papers)
Having turned my attention to the steam Engines