Copy letter, from Sir John Herschel to James South Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Making, reducing, and publishing double star work is very difficult and, because of Wilhelm Struve's recent endeavors, less pressing than it had been. Mentions various doubles. Expresses interest in James South's plan to purchase a very large refractor. 10 March 1825