11Thomas Jefferson to Mathew Carey, 10 May 1818 (Jefferson Papers)
McMahon, Bernard; The American Gardener’s Calendar [index entry]
12Mathew Carey & Son to Thomas Jefferson, 16 May 1818 (Jefferson Papers)
McMahon, Bernard; The American Gardener’s Calendar [index entry]
13Thomas Jefferson to Mathew Carey, 21 June 1818 (Jefferson Papers)
McMahon, Bernard; The American Gardener’s Calendar [index entry]
14Thomas Jefferson to Mathew Carey, 28 June 1818 (Jefferson Papers)
McMahon, Bernard; The American Gardener’s Calendar [index entry]
15Mathew Carey & Son to Thomas Jefferson, 5 July 1818 (Jefferson Papers)
McMahon, Bernard; The American Gardener’s Calendar [index entry]