Memoirs of Margaret Fuller Ossoli
p103“As I was steeped in the divine tenth book of the Republic, came ——'s letter...”
Emerson, Ralph Waldo, William Henry Channing, and James Freeman Clarke, eds. Memoirs of Margaret Fuller Ossoli. 2 vols. Boston: Phillips, Sampson and Company, 1852.
This entry identifies Plato's Republic, specifically Book X, which Fuller describes as "the divine tenth book." While not quoting directly, Fuller relates her engagement with this profound philosophical text to a moment of personal distraction, noting she was "steeped in" it and finished an "obstinate" reading before seeking solace in nature.