1Appendix: Meteorological Journal for Orange County, Virginia, 1 April–26 June 1786, and 18 January 1787 (Madison Papers)
Whip poor Will first heard
2Memorandum Books, 1790 (Jefferson Papers)
Heard the first whip-poor-will.
3From Thomas Jefferson to Mary Jefferson, 13 June 1790 (Jefferson Papers)
...the same day I heard the first Whip-poor-will whistle. Swallows and martins appeared here...
4Memorandum Books, 1791 (Jefferson Papers)
Heard the first Whip-poor-will.
5To James Madison from Thomas Jefferson, 3 April 1794 (Madison Papers)
...table. The Lilac in blossom, & the first Whip-poor-will heard last night. No Martin’s yet. I...
6From Thomas Jefferson to James Madison, 3 April 1794 (Jefferson Papers)
.... The Lilac in blossom, and the first Whip-poor-will heard last night. No Martins yet. I...
7To John Adams from John Quincy Adams, 14 September 1811 (Adams Papers)
...hoarse upon the sky, and now when the whip-poor-will warble of Walsh and the raven croak of...
8“Johannes Vonderpuff” to Thomas Jefferson, 1 October 1814 (Jefferson Papers)
the whip poor-will,
9Thomas Jefferson: Analysis of Weather Memorandum Book, January 1817 (Jefferson Papers)
the Whip-poor-will is heard
10Enclosure: Thomas Jefferson’s Summary of Weather Observations, 1810–1816, [ca. 11 April 1818] (Jefferson Papers)
the whip-poor Will is heard