Fitz-Greene Halleck (1848). “The Poetical Works of Fitz-Greene Halleck: Now First Collected. Illustrated with Steel Engravings, from Drawings by American Artists”, p.88
Robert Pollok (1833). “The Course of Time, a Poem: With a Memoir of the Author, an Introductory Notice, a Copious Index, and an Analysis Prefixed to Each Book”, p.74