1839—
Letter to Sarah Helen Whitman
p74read
“This author, Sterling, who wrote also the Crystals from a Cavern and the fine poetical pieces signed Archaeus is a great encouragement to me.”
The same sentence also names Thoughts and Images' and/or 'Land and Sea'. Counted as one engagement.
Fuller, Margaret. The Letters of Margaret Fuller. Edited by Robert N. Hudspeth. Vol. II. Ithaca: Cornell University Press, 1984.