Winston Churchill's remarks as Home Secretary in a 1910 Departmental Paper (the original document is in the collection of Asquith's papers at the Bodleian Library in Oxford); later quoted in Clive Ponting "Churchill", 1995.
Thomas Jefferson (1853). “The writings of Thomas Jefferson: being his autobiography, correspondence, reports, messages, addresses, and other writings, official and private : published by the order of the Joint Committee of Congress on the Library, from the original manuscripts, deposited in the Department of State”, p.203
Henry George (2014). “A Perplexed Philosopher: Being an Examination of Mr. Herbert Spencer's Various Utterances on the Land Question, with Some Incidental Reference to His Synthetic Philosophy”, p.6, epubli
'Letters to a Young Man whose Education has been Neglected' no. 3, in the 'London Magazine' January-July 1823. De Quincey adds that he is indebted for this distinction to 'many years' conversation with Mr Wordsworth'