1To Benjamin Franklin from Michel-Guillaume St. John de Crèvecœur, 5 December 1781 (Franklin Papers)
...I woud fain hope, must place the Keystone to the Strong arch of our American...
2From Benjamin Franklin to [John Jay], [after 14 February 1782] (Franklin Papers)
Your Comparison of the Keystone of an Arch
3Debates and Resolutions Related to the Regulation of Commerce by Congress, Including a Call for a Convention at … (Madison Papers)
...northern trip that Virginia could be the keystone to a whole plan of national commercial...
4To James Madison from Thomas Jefferson, 22 July 1789 (Madison Papers)
...Vaudreuil, Abbé Vermont confessor of the queen and keystone of all the intrigues, all fled out...
5From Thomas Jefferson to James Madison, 22 July 1789 (Jefferson Papers)
...Vaudreuil, Abbé Vermont confessor of the queen and keystone of all the intrigues, all fled out...
6Thomas Boylston Adams to Abigail Adams, 9 June 1799 (Adams Papers)
...against Scott were that he used a rejected keystone to build a step leading into the kitchen...
7To James Madison from William Irvine, 23 March 1801 (Madison Papers)
The Keystone in the Democratic Arch: Pennsylvania Politics, 1800–1816
8To James Madison from John Knapp, 29 March 1801 (Madison Papers)
Keystone in the Democratic Arch
9To James Madison from Tench Coxe, 3 April 1801 (Madison Papers)
Keystone in the Democratic Arch
10To Thomas Jefferson from William Duane, 10 June 1801 (Jefferson Papers)
The Keystone in the Democratic Arch: Pennsylvania Politics 1800–1816