Sally Noble was the last fluent speaker of Chimariko, a language once spoken in Trinity County of northwestern California by the Chimariko peoples.
Noble's Tsnungwe father died young, leaving her in the care of her Chimariko mother Polly Dyer, who raised her to speak her language.
Between September 1921 and January 1922, in her home on the New River, Noble collaborated with linguist and ethnologist J. P. Harrington. Although she had been speaking only English for many years, Noble worked with Harrington to document what she could remember of the Chimariko language (which was plenty - Harrington described her knowledge as almost exhaustive).
Sally Noble died in February 1922, shortly after Harrington's departure.
Sources:
Sally Noble, www.wikipedia.org
Surviving Through the Day, Herbert W. Luthin
Tsnungwe Place Names, www.dcn.davis.ca.us/~ammon/tsnungwe/placenames.html