Copy letter, from Sir John Herschel to Sir William Watson, dated at Palermo Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Written from Palermo, this chatty letter describes John Frederick William Herschel's time in Italy and Sicily. John Frederick William Herschel mentions having ascended Mt. Etna and having spent the night on its summit. A second part of this letter is dated July 19 and its location is given as Naples. On way to Hanover. 16 July 1824