Letter to Sarah Shaw
p175“I had not strength or time to walk so far, and no fiery-footed steeds offered themselves to convey me.”
Fuller, Margaret. The Letters of Margaret Fuller. Edited by Robert N. Hudspeth. Vol. III. Ithaca: Cornell University Press, 1986.
Inferred Fuller alludes to Juliet's soliloquy opening Act III, scene 2 of Romeo and Juliet when she uses the phrase "fiery-footed steeds" without attribution.