Responds to request for advice on operation of the observatory established at Mauritius by John A. Lloyd. Urges it can profitably make meteorological observations and positional determinations for southern stars. Stresses the need for prompt reduction of observations.

Fulfills request for advice on the operation of the Cape Observatory. Urges, among other points, that Thomas Maclear be given a second assistant and an improved telescope and that the observatory be assigned to undertake tidal, meteorological, and magnetic observations.

Admiralty wants to adapt observatory at Mauritius for rating ship chronometers in southern hemisphere. Rigorous attention to time determination would benefit meteorological, hydrographic, and astronomical observations, making Mauritius 'a National Center of Reference' for global research.

Remarks by JH on proof sheet of Henry Taylor's catalog of circumpolar stars observed by Stephen Groombridge. Why is Gerard Moll, a foreigner, engaged in purely English controversy? JH wants no part of Charles Babbage and James South in this matter. Regrets JH's earlier statements. Sends extract from [Richard] Copeland's letter.

With great reluctance due to his plans for the future, JH agrees to let his name stand in nomination for the Presidency of the R.S.L.

Has been observing Halley's Comet —'altogether the most beautiful thing I ever saw in a telescope.' Comet has tripled in diameter during the last week.

Has received Francis Baily's Account of the Rev. John Flamsteed [1835]. Comments that its best part is Baily's restoration of the British Catalogue. JH now thinks less of Flamsteed.