Copy letter, from Sir John Herschel to John Brinkley, dated at 56 Devonshire St. Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Mislaid the copy of one of John Brinkley's mss. and would be grateful if he knows of its whereabouts. In the course of his travels in Europe he has seen some astronomical instruments, which will in time surpass any British made ones and especially those of G. B. Amici and Josef Fraunhofer. 11 December 1824