Shapiro, Ruskin in Italy: Letters to his parents 1845, copies a letter from Ruskin written to John James Ruskin on 8 June 1845. It implies that this was the first occasion that he fully defined his distaste for Salvator Rosa 's work, but that seems not to fit the chronology of Modern Painters I:
I wasn't fit for anything else, so I sauntered into the Palazzo Pitti to look at the Salvators, which I was rather curious about. Iwas disappointed exceedingly as I walked through the rooms. After the frescoes I have been among, the pictures looked like rubbish, and most of them, thanks to the cleaners, I find are so. Nothing is left of Titian's 'Magdalen' but a lock or two of curly hair-and her box. But for Salvator, I was so thoroughly disgusted that I could hardly bring myself to stand before the pictures. I could not, by-the-bye, have come from a more unfortunate school for him [ i.e. Angelico's frescoes]; but I never thought he was such a mindless charlatan, such a sanguinary ruffian; his battle pieces are fit for nothing but signs over a butcher's shop; it is pollution to look at them, and his two celebrated marines!! But you see if I don't give it him; I'll settle his hash for him this time.