„I have made as many as eighteen [rather definitive sketches of cattle] in one month..“
Quoted by W.H. Fuller, https://ia601705.us.archive.org/34/items/frick-31072002278184/31072002278184.pdf, in Constant Troyon and Charles Daubigny at the Union League Club - catalogue of November Exhibition 1895; publisher: Gallison & Hobron, New York 1895, p. 12
A friend of Troyon relates how the painter, after his return in 1855 from a sketching tour in Touraine, showed him what seemed an almost endless panorama of great, splendid studies of cattle, most of which were, indeed, finished pictures; and when he expressed astonishment at their number and beauty, Troyon responded quietly
