| √ | Century of Experience | Evidence | Name of Reader / Listener / Reading Group | Author of Text | Title of Text | Form of Text | | |
| 1700-1799 | John Playfair to Mary Berry, 8 May 1796: 'I waited with much impatience for the "Life and Miscellaneous Works of Gibbo... | John Playfair | | The Life and Miscellaneous Works of Gibbon | Print: Book |
| 1700-1799 | John Playfair to Mary Berry, 8 May 1796: 'I have lately seen a posthumous work of Condorcet's; it is a very curious bo... | John Playfair | Condorcet | [unidentified posthumously-published work] | Print: Book |
| 1800-1849 | John Playfair to Mary Berry, from Cambridge, 28 September 1804:
'In going into a great library, it often occurs to... | John Playfair | | Theatrum Cometicum | Print: Book |
| 1800-1849 | John Playfair to Mary Berry, 22 September 1810, in response to her edition of the Letters of Madame du Deffand, receiv... | John Playfair | Mary Berry | Preface and notes to Letters of Madame du Deffand | Print: Book |
| 1800-1849 | John Playfair to Mary Berry, 22 September 1810, in response to her edition of the Letters of Madame du Deffand, receiv... | John Playfair | Madame du Deffand | Letters | Print: Book |