| √ | Century of Experience | Evidence | Name of Reader / Listener / Reading Group | Author of Text | Title of Text | Form of Text | | |
| 1850-1899 | ?Two or three years my senior, Sam, like myself, was acquiring a taste for books. Our tastes were not wholly dissimila... | Samuel Bailey | Alexander van Humboldt | Cosmos | Print: Book |
| 1800-1849 | Letter from Aikin to her brother Edmund, dated March 1818: 'It is curious to observe the native eloquence of Humboldt ... | Lucy Aikin | Alexander von Humboldt | Personal Narrative of Travels | Print: Book |
| 1800-1849 | 'When I returned to Annan, it occurred to me, that it would be proper to see what was become of my Hall discourses. It... | Thomas Carlyle | Friedrich von Humboldt | Essai politique sur la royaume de nouvelle espagne | Print: Book |
| 1800-1849 | 'All the while I am writing now my head is running about the Tropics: in the morning I go and gaze at Palm trees in th... | Charles Darwin | Humboldt | unknown | Print: Unknown |
| 1800-1849 | 'I hope you continue to fan your Canary ardor: I read & reread Humboldt, do you do the same, & I am sure nothing will ... | Charles Darwin | Humboldt | unknown | Print: Unknown |
| 1800-1849 | 'I now first felt even moderately well, & I was picturing to myself all the delights of fresh fruit growing in beautif... | Charles Darwin | Humboldt | unknown | Print: Unknown |
| 1800-1849 | 'If you really want to have a [notion] of tropical countries, study Humboldt.? Skip th[e] scientific parts & commence ... | Charles Darwin | Alexander von Humboldt | unknown | Print: Unknown |
| 1850-1899 | George Grote to John Stuart Mill (October 1857):
'I have looked at W. Humboldt's book: it is written in a very exce... | George Grote | W. Humboldt | | Print: Book |