Letter to William H. Channing
p190“There was a young man with us with a most poetic face. I met him again next day at dinner, his name is Heath. He talked of the Lady of Shalot and looked as if he might have lived as she did.”
Fuller, Margaret. The Letters of Margaret Fuller. Edited by Robert N. Hudspeth. Vol. II. Ithaca: Cornell University Press, 1984.
Fuller mentions John Francis Heath talking of 'the Lady of Shalot' — Hudspeth identified this as Tennyson's poem, first published in Poems (London, 1833, though dated 1832).