William Morley Punshon, John Bunyan, Thomas Babington Macaulay Baron Macaulay, William Wilberforce (1881). “Biographical and Historical Lectures: Comprising: The Prophet of Horeb, John Bunyan; Macaulay; Wilberforce; The Huguenots”
Pitirim Aleksandrovich Sorokin (2002). “The Ways and Power of Love: Types, Factors, and Techniques of Moral Transformation”, p.12, Templeton Foundation Press
Erasmus Darwin (1825). “The Botanic Garden: A Poem, in Two Parts ... The Economy of Vegetation, and The Loves of the Plants. With Philosophical Notes”, p.7
William Wordsworth (1848). “The Complete Poetical Works of William Wordsworth: Together with a Description of the Country of the Lakes in the North of England”, p.186