Letter, from Franz Xaver von Zach to Sir John Herschel, dated at Genoa Autograph letter signed by sender. Comments on a variety of topics about various scientific persons on the Continent, on John Frederick William Herschel's travels in Europe, on ways to send packets between England and Europe, and on FZ's copy of the Nautical Almanac, which FZ has not yet received. Makes comparisons between his and John Frederick William Herschel's barometer, offers some comet observations, and talks about the appropriate date for Easter. Awaits John Frederick William Herschel's double star observations. 7 February 1825