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About the question of an astronomer for a vacant position at Kew Observatory.
George Everest-Thomas Jervis affair. Observations on the production of color by chemical rays.
Thanks GA for all his efforts on Thomas Maclear's behalf [see GA's 1839-2-25]; comments on some developments in photography, including the work of Nicephore Niepce done in approximately 1826.
Sympathizes with GA in the family sorrow [deaths of GA's sons Arthur and George]; JH complains that house hunting, and other matters, are keeping him from important work.
About astronomical matters, such as parallax and variable stars.
Brief note supporting GA's medal recipient ideas [see GA's 1839-12-16], and adding some of JH's ideas.