1William Steptoe to Thomas Jefferson, [24 July 1819] (Jefferson Papers)
medicine; castor oil [index entry]
2Extracts from Ellen W. Randolph (Coolidge) to Martha Jefferson Randolph, 28 July 1819 (Jefferson Papers)
medicine; castor oil [index entry]
3Thomas Jefferson to James Leitch, 17 March 1820 (Jefferson Papers)
medicine; castor oil [index entry]