Received JH's letter of 17 July. Sent woodcut to W. S. Smyth as requested.

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.

Complications with JH's trusteeship for CB's sister [Mary Anne Hollier]. Details of how other trusts are managed. Will consult Edward Ryan about JH's desire to resign from trust. CB's brother-in-law Wolryche Whitmore died.

Thanks for paper on magnetism, and other minor matters.

Calls attention to vol. 3 of Toronto observations, where Edward Sabine, [T. R.] Robinson, and HL expressed their views on continuing magnetic observations. Emphasizes importance of discovering physical and mathematical laws that govern magnetic phenomena. Sufficient data already exist for this. Recommends continuing hourly observations for five more years at seven foreign observatories (listed). [JH note: Routing slip to B.A.A.S. committee, instructing each member to read and forward HL's recommendations.]

Forwarded JH's letter of 8 Aug. 1858 to members of magnetic committee, who will respond before B.A.A.S. meeting in Leeds next month. Asks that both committees meet jointly on first day. Edward Sabine is willing to superintend new series of observations proposed by JH.

Initial results of WM's crystallographic examination of copper salts sent by JH. Awaits results of electrical discharge experiments.

Further results from tests that WM conducted on copper salts sent by JH.

Asks JH to review R.S.L.'s reply to Prince Albert regarding extension of B.A.A.S. magnetic and meteorological observations. RO enjoyed photo[micro]graphs of aquatic animalcules; these give clear insight into 'the spontaneous production of the species....'

[Marked 'Private.'] Treasury replied unfavorably to request for extension of magnetic observations. C. E. Trevelyan suggests that joint letter from JH and presidents of R.S.L. and B.A.A.S. proposing only one observer (no observatory) at Peking would be acceptable, if estimated cost is included. No other locations will be approved. This concession was made possible by influence of Prince Albert.

Confer with William Whewell on magnetic observations, then notify GP. Health is improving. Cambridge residents are angry over proposed changes but ignore similar changes at Oxford.

Forwarded JH's and Humphrey Lloyd's letters to G. B. Airy and William Whewell. Cannot attend B.A.A.S. meeting at Leeds. Does JH concur with Edward Sabine's latest suggestions?

Forwards copy of the resolution of the General Committee of the B.A.A.S. concerning the continuation of study of magnetic observations.

Humphrey Lloyd, Thomas Robinson, and Edward Sabine will form a committee to continue studying magnetic observations.

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.

Replies to specific requests by committee for summary of benefits from research in terrestrial magnetism and meteorology and for ES's opinion on continuance of observatories. [JH annotation: Routing list to G. B. Airy, George Peacock, and William Whewell.]

Sends proofs of editor's notes from vol. 4 of [Elizabeth J. Sabine's] translation of Alexander von Humboldt's] Cosmos. Assumes that JH and magnetic committee members all have copies of 'Introduction' to vol. 3 of Toronto observations. Managed to clear up 'mystification' in J. B. Biot's account of pendulum experiments.

ES's paper on magnetic observatories in colonies is same as 'Introduction' to vol. 3 of Toronto observations. Publisher has delayed [Elizabeth J. Sabine's] translation of vol. 4 of Cosmos; please send JH's copy of 'Editor's Notes' to other members of magnetic committee. J. B. Biot intentionally subordinated English pendulum experiments to French experiments, and Alexander von Humboldt was misled.

Current activities at magnetic observatories at Cape of Good Hope, Hobart [Tasmania], and Toronto. Future avenues for research in terrestrial magnetism include correlation with sunspot cycles, annual seasons, parallels of latitude, and lunar position. Urges establishment of many more observing stations. [JH annotation: Routing list to G. B. Airy, George Peacock, and William Whewell.]

Forwards report, just received, of three years of lunar diurnal variation at Cape of Good Hope. [JH annotation: Routing list to G. B. Airy, George Peacock, and William Whewell.]