11William Lambert to Thomas Jefferson, 24 July 1810 (Jefferson Papers)
Greenwich Observatory, England; and prime meridian [index entry]
12William Lambert to Thomas Jefferson, 19 April 1810 (Jefferson Papers)
Greenwich Observatory, England; and prime meridian [index entry]
13William Lambert to Thomas Jefferson, 8 December 1809 (Jefferson Papers)
Greenwich Observatory, England; and prime meridian [index entry]
14William Lambert to Thomas Jefferson, 5 December 1809 (Jefferson Papers)
Greenwich Observatory, England; and prime meridian [index entry]
15Enclosure: 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]
16William Lambert to Thomas Jefferson, 17 September 1809 (Jefferson Papers)
Greenwich Observatory, England; and prime meridian [index entry]
17William Lambert to Thomas Jefferson, 4 September 1809 (Jefferson Papers)
Greenwich Observatory, England; and prime meridian [index entry]
18William Lambert to Thomas Jefferson, 23 July 1809 (Jefferson Papers)
Greenwich Observatory, England; and prime meridian [index entry]
19William Lambert to Thomas Jefferson, 13 June 1809 (Jefferson Papers)
Greenwich Observatory, England; and prime meridian [index entry]