George Canning (1842). “Select Speeches of the Right Honourable George Canning: With a Preliminary Biographical Sketch, and an Appendix, of Extracts from His Writings and Speeches”, p.557
William Carlos Williams, A. Walton Litz, Christopher MacGowan (1991). “The Collected Poems of William Carlos Williams: 1939-1962”, p.88, New Directions Publishing
Louis Freeland Post, Henry George (1899). “The Single Tax: An Explanation, with Colored Charts and Illustrated Notes of the Land, Labor, and Fiscal Reform Advocated by Henry George”
Henry George (1886). “Progress and Poverty: An Inquiry Into the Cause of Industrial Depressions, and of Increase of Want with Increase of Wealth [and] the Remedy”
William Cowper (1856). “The task, Table talk, and other poems: With critical observations of various authors on his genius and character, and notes, critical and illustrative”, p.265