Letter, from Wilhelm Struve to Sir John Herschel, dated at Dorpat Autograph letter signed by sender. Mentions a four month absence from Dorpat. Commends [James] South on his work on double stars yet states that South's distances for nearby stars are too large. Considers his measurements, previous to his [Josef] Fraunhofer telescope, significant, even if South refuses to accept them. Thanks John Frederick William Herschel for the difference in the longitudinal measurements between Paris and Greenwich. 4 November 1826