Michel Foucault, "Discourse and truth:
the problematization of parrhesia." (six lectures given at the University
of California at Berkeley, Oct-Nov. 1983; ed. by Joseph Pearson in 1985.
Apparently these lecture notes are also available in print.
A must read for rhetoricians!!
Michel Foucault, "Madness,
the Absence of Work," Critical Inquiry (tiny excerpt)...
see also Excerpts
from "Georges Canguilhem on Michel Foucault's Histoire de La folie."