Letter, from Herbert Spencer to Sir John Herschel, dated at Oakley Square Autograph letter signed by sender. [Responding to John Frederick William Herschel's 1860}-1-12,] Herbert Spencer admits some of John Frederick William Herschel's objections to Herbert Spencer's views on distribution of cometary orbits, but attempts to salvage Herbert Spencer's cyclonic theory of sunspot formation. 18 January 1860