Thanks ES for receipt of information about magnetic curves and the work of [A. D.] Bache. JH is glad to hear ES is back to active work again, but JH says he is too ill to go to the B.A.A.S. meeting [in Aberdeen].

Regrets he will be unable to attend the forthcoming wedding.

Sends a copy of [John?] Dalton's letter for which he is obliged. Expresses appreciation of his recent visit to Kent and Sussex.

Send names of members of B.A.A.S. committee appointed to cooperate with R.S.L. committee for purpose of procuring continuance of observations of terrestrial magnetism.

Sorry that CB's nephew bothered JH with request for money from fund for CB's sister. Nephew must deal directly with Reversionary Interest Society. Recalls mutual vow of JH and CB forty years ago to pursue many intellectual endeavors.

On 10 Dec., JH, George Peacock, and William Whewell were named to R.S.L. committee to cooperate with B.A.A.S. for purpose of continuing observations of terrestrial magnetism.

Thanks GA for a letter of introduction to friends in Rome [used by JH's daughter Margaret Louisa and her new husband, Reginald Dyke Marshall]; JH is willing to serve on a committee with GA and others if he does not have to go to London for meetings.

Wants someone else to take responsibility for committee on magnetic observations [see JH's 1858-1-25]; GA proposes Edward Sabine.

Feeling better, but writing still painful. Writing articles on meteorology and geology for Encyclopaedia Britannica. May use information from her Physical Geography.

Will ask Parisian doctors for information JH wanted and transmit it immediately. Hopes change of air will improve JH's health. Regrets JH is not closer to the capital so that the best doctors could help. Is writing Mr. Royer to ask him to write to JH.

Expects that JH has received instructions sent through Mr. Royer. Informs JH that HR is sick and will visit some friends to recuperate.

Has been appointed, with William Whewell, to committee to help ensure continuance of observations on terrestrial magnetism. Needs names of those on B.A.A.S. committee with whom they will work.

Thanks for and comments on new edition of WG's Correlation of Physical Forces, particularly the subject of transformation of heat into motion.

Reports misplacement of letters of William Herschel after publication of extracts for The Times.

Requests an address of a Mr. Macintosh in order to inquire about a lecture topic.

Wishes to introduce an American friend, Professor Stephen Alexander, to JH.

Sending him local paper so that he can see how the Oxford news has been received. Corporation of Southampton has come into a legacy.

Sends him photograph of his godchild. Would like some lines from JH that he (the godchild) might keep.

Thanks for the gift of a book of verse.

Too busy to answer his last letter until now. His theorem on perspective is pretty and easy. Quotes one he uses. Has been busy finding the proof that every algebraic equation has a root. Has been organ tuning. Comments on the method of tuning using beats.