1To Thomas Jefferson from William Lambert, 8 June 1793 (Jefferson Papers)
....C., to replace Greenwich, England, as America’s prime meridian ([Washington]
2To Thomas Jefferson from William Lambert, 15 December 1804 (Jefferson Papers)
...in September 1809, for consideration in fixing a prime meridian of the United States (...
3William Lambert to Thomas Jefferson, 14 March 1809 (Jefferson Papers)
...for building a national astronomical observatory and establishing an American prime meridian in
4William Lambert to Thomas Jefferson, 13 June 1809 (Jefferson Papers)
astronomy; and calculations of prime meridian [index entry] ...England; and prime meridian [...
5William Lambert to Thomas Jefferson, 23 July 1809 (Jefferson Papers)
astronomy; and calculations of prime meridian [index entry] ...England; and prime meridian [...
6William Lambert to Thomas Jefferson, 4 September 1809 (Jefferson Papers)
astronomy; and calculations of prime meridian [index entry] ...England; and prime meridian [...
7Thomas Jefferson to William Lambert, 10 September 1809 (Jefferson Papers)
astronomy; and calculations of prime meridian [index entry] ...; and prime meridian [...
8William Lambert to Thomas Jefferson, 17 September 1809 (Jefferson Papers)
astronomy; and calculations of prime meridian [index entry] ...England; and prime meridian [...
9Enclosure: William Lambert’s Table for Computing the Moon’s Motion, with Examples [ca. 19 September 1809] (Jefferson Papers)
Greenwich Observatory, England; and prime meridian [index entry] ...of prime meridian...
10William Lambert to Thomas Jefferson, 5 December 1809 (Jefferson Papers)
astronomy; and calculations of prime meridian [index entry] ...England; and prime meridian [...