Regarding custody of the Standards.

Is inquiring, on behalf of the Admiralty, about ordering an equatorially mounted achromatic telescope for the Royal Observatory at the Cape of Good Hope.

Offers condolences to Ann Smyth. WS's calculation of Gamma Virginis orbit surprises JH. Concerned about accurate methods of calculation. Remarks on excavation of Chelsea mammoth.

Makes some suggestions about possible storage places for the United States' standards [see GA's 1843-9-9].

Enjoyed reading CH's account of some significant events from her life. Reports that James Clark Ross has returned safely from his South Pole expedition in which Ross discovered the true position of the South Magnetic Pole.

Regarding the cost of printing the catalogues, and matters pertaining to them. Can FB give him any general table of processions. Has started work on the letter press of his own book.

B.A.A.S. approved WB's employment by Magnetical and Meteorological Committee to explore atmospheric waves. Will send Russian observations tomorrow. Howard Elphinstone agrees to send his observations [at Ore, near Hastings]. Lists meteorology books.

Comments on RH's chromatype photographic process and other processes tried by JH.

Inquires of CL about the suitability of George Robert Waterhouse for a natural history post in the British Museum. Congratulates CL on his successful trip to the United States.

Gives formula for defining the measure of the scale of an actinometer.

[Replying to remarks by T. R. Robinson reported in Athenaeum, #830 (Sept. 23, 1843), 866-7,] JH argues that William Herschel's 40-foot reflector was not a failure, noting, for example, the discovery by it of the sixth and seventh Saturnian satellites.

[Writing to the Archbishop [of Canterbury, William Howley]], recommends George R. Waterhouse as a candidate for employment at the British Museum.

Recommends buying optics for 7.5-inch telescope from Metz and Mahlers in Munich and having those mounted in London.

Sends Howard Elphinstone's barometer observations [at Ore, near Hastings].

Has to come to town for a Trustee meeting of the British Museum and wonders whether it would be convenient for him to visit Tavistock Place to consult him on various matters.

Urges doubling number of lunar observations.

Construction of JH's new instrument for photographing spectral lines is still incomplete, and A. E. Becquerel has already announced discovery. JH will return £100 granted to JH by R.S.L.

Relinquishes R.S.L. Donation Fund for spectrometer [see JH's 1842-6-1], because [A. C.] Becquerel's research makes it obsolete.

Both JH and his wife, Margaret, are very concerned about the health of Madame Gerlach, the aunt of NS. Details are provided.

Would support improvements, both in number and quality, of lunar observations at the Royal Observatory; current practices produce unacceptably large predictive errors.