Letter to James F. Clarke
p182“At E.s I read that tangled phantasm of passionate folly, Glenarvon, from beginning to end, and made some new remarks on that mist of hallucination and bewildered cunning the Dr's mind.”
Fuller, Margaret. The Letters of Margaret Fuller. Edited by Robert N. Hudspeth. Vol. VI. Ithaca: Cornell University Press, 1988.
Fuller names Glenarvon explicitly and reports reading it from beginning to end at Elizabeth's house; she comments analytically on it as a "tangled phantasm of passionate folly" and discusses its "mist of hallucination and bewildered cunning," as Hudspeth identified, attributing it to Lady Caroline Lamb.