Letter, from Edward James Stone to Sir John Herschel, dated at Royal Observatory, Greenwich Autograph letter signed by sender, with diagrams. In response to a letter from John Frederick William Herschel [the Royal Astronomical Society Monthly Notices, 26 (1866), 299-300] giving eye estimations of magnitudes of stars about Epsilon Coronae, suggests that the star John Frederick William Herschel observed may be 'the new variable' [T Coronae]. Reports Greenwich observations of this new variable star. 29 May 1866