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About travel plans once he recovers his health.
Could he let him have the address of his son James as his mother died this morning.
Is grateful for the present. Did not request the money as a gift.
Thanks for the double star catalogue of JH and James South; comments on observing Encke's and Biela's comets.
Sending by the bearer mirror No. 3 of which he spoke. Will exchange it for Troughton's if TH can make use of JH's. Do not attempt to clean Edward Troughton's mirror with acid. Hopes he does not feel obliged to carry out any particular series of observations.
Knows nothing of the enmity of Humphry Davy towards [John] Herapath. The purpose of JH's last letter was to point out that Herapath was in error in his solution of certain equations. Must consider correspondence closed.
Desires to present methods of occultation observation to the Astronomical Society.
Much obliged for his letter. Will be glad if he would correct the press of his paper. Encloses a printed sheet, which may amuse him.
Has recently discovered in Cumberland a rich vein of cobalt, which is mixed with iron. Would like his opinion whether these ores can be easily separated. Can send him a specimen if required.
Forwards a specimen of his cobalt. Gives price and the various methods of use and refining. Thinks the analysis did not show its true qualities. Would like to hear the results of JH's experiments.
Has too long delayed thanking him for his works. Sends some memoirs of Edward Sabine, etc. Comments on work that needs doing.
Sends the last volume of his Mécanique céleste for the R.S.L. Comments on his various activities. Is grateful for the memoirs JH sent.