1David Isaacs to Thomas Jefferson, [30 March 1822] (Jefferson Papers)
62 ½ ℔ Beef—7 Cents—$4–37 ½ for M r Jefferson RC ( MHi ); written on a small scrap; undated; endorsed by TJ: “ Isaacs Dav . Mar. 30. 22 . 4.37 ½ ”; with penciled calculation on recto, probably by TJ, subtracting 5.62 ½