Copy letter, from Sir John Herschel to Thomas Romney Robinson, dated at Collingwood Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Continues opposed to application to government to support the 'Great Southern Reflector' [see John Frederick William Herschel's 1849-10-27]; responds to a number of specific queries about the construction of such a telescope. 31 May 1850