Letter to Susan Prescott
p154“Miss Francis and I think of reading Locke, as introductory to a course of English metaphysics, and then De Stael on Locke's system.”
Fuller, Margaret. The Letters of Margaret Fuller. Edited by Robert N. Hudspeth. Vol. I. Ithaca: Cornell University Press, 1983.
Inferred Fuller writes of reading "De Stael on Locke's system"; Hudspeth identified this specifically as the section "De la philosophie angloise" in book 2, part 3, chapter 2 of De l'Allemagne, which discusses Locke's empiricism.