Recorded by Jefferson at Pusspatock Settlement, Brookhaven, Long Island, June 13, 1791, in the presence of James Madison and General Floyd. Recorded from two old women fluent in the language, and one young woman with some knowledge of the language. None of them are named by Jefferson.
Comparative vocabulary of 22 Native American languages, based on Jefferson's collection of vocabularies on printed forms. This document was damaged in transit from the White House to Monticello in 1809 (see letters of Jefferson to Peter S. Du Ponceau, November 7, 1817, and April 26, 1816.)