1Samuel Brown to Thomas Jefferson, 1 October 1812 (Jefferson Papers)
grass; Guinea [index entry]
2George Poindexter to James Monroe, [before 20 March 1813] (Jefferson Papers)
grass; Guinea [index entry]
3Thomas Jefferson to Samuel Brown, 17 April 1813 (Jefferson Papers)
grass; Guinea [index entry]
4Thomas Jefferson to Samuel Brown, 24 April 1813 (Jefferson Papers)
grass; Guinea [index entry]
5Samuel Brown to Thomas Jefferson, 25 May 1813 (Jefferson Papers)
grass; Guinea [index entry]
6Petty Vaughan to Thomas Jefferson, 29 March 1819 (Jefferson Papers)
grass; Guinea [index entry]
7Enclosure: Petty Vaughan’s Notes on Guinea Grass, 29 March 1819, enclosure number 2 in Petty Vaughan to Thomas … (Jefferson Papers)
grass; Guinea [index entry]
8Thomas Jefferson to John S. Skinner, 16 May 1820 (Jefferson Papers)
grass; Guinea [index entry]