Letter, from Francis Lunn to Sir John Herschel, dated at Hawarden Castle Autograph letter signed by sender. Their letters have missed more than once, and John Frederick William Herschel's last letter is now at the Return Office. Would like to see this letter to learn John Frederick William Herschel's views on the article on Heat. Gives own ideas how article should be written, too busy himself, so hopes John Frederick William Herschel can write it, or does he know any other person? 14 January 1825