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In a postscript, Basil Hall says that he plans to bring his camera when the Hall's come to visit so that he may photograph what remains of the great 40-foot reflector.
In response to KK's 1839-10-22, JH sends information on [A. F.] Osler's anemometer, and on magnetic measurements to be carried out.
Is working towards having the government hire the school masters [see GN's 1839-9-30] that GN asked JH to find. JH has also spoken to Lord John Russell about Andries Stockenstrom's plight. [Letter finally completed on 1840-2-11.]
Requests another copy of WH's paper on light, recently read at Royal Irish Academy, having sent JH's own copy to Prague's [Karl] Kreil for description of [Humphrey] Lloyd's vertical magnetometer contained therein. Has WH yet found the three axes of the universe? Comments on WH's sister's 'charming' poetry.