Journal April 1839
p41“Hazlitt says 'Genius and originality is, for the most part, some strong quality in the mind, answering to, and bringing out some new and striking quality in nature.”
Fuller, Margaret. "Journal April 1839." Houghton Library, Harvard University; bMS Am 1086 (Box A); Box 5 (99).
Inferred Fuller quotes Hazlitt naming him by surname only; his definition of genius is from 'On Genius and Common Sense' in Table-Talk (1821–22). Fuller quotes Hazlitt's definition of genius from his essay 'On Genius and Common Sense' (Table-Talk, Vol. I, 1821; Vol. II, 1822). Title inferred from context — it is Hazlitt's most famous essay on genius.
The quote matches closely: 'Genius or originality is, for the most part, some strong quality in the mind, answering to and bringing out some new and striking quality in nature.' Fuller attributes it by surname only ('Hazlitt says').