1Petty Vaughan to Thomas Jefferson, 29 March 1819 (Jefferson Papers)
Enclosed I take the liberty of handing you three hastily written papers: 1— On the Culture of...
2Enclosure: Petty Vaughan’s Notes on Rutabaga (Swedish Turnip), 29 March 1819, enclosure number 1 in Petty Vaughan to … (Jefferson Papers)
Notes on the Culture of the Swedish Turnip , as practised in Maine with success. 1. Rich loam, or...
3Enclosure: Petty Vaughan’s Notes on Guinea Grass, 29 March 1819, enclosure number 2 in Petty Vaughan to Thomas … (Jefferson Papers)
The Guinea Grass succeeds well in Jamaica upon dry, stony uplands; & when well established, will...