No summary available.

Tells AQ of 'negligent inattention' regarding Belgium's instruments. Has extracted promise from [William?] Simms that the equatorial should be finished by Christmas and mural circle within the following year. Mentions seeing Colonel Blake and [G. P.] Dandelin. Regrets [P. F.] Verhulst's illness. Discusses lichen.

Apologizes for being poor correspondent. Interested in AQ's idea of taking magnets along on trips. JH used to bring his barometer. Is busy reducing sweeps. Has little time for chemistry and optics. Discusses Borax. Has worked with orbits of double stars. Mentions Mrs. Somerville's Celestial Mechanics.

Requests that AQ forward letter to London explaining JH's delay in returning home. Promises to send latest paper on orbits of double stars. Mentions [Wilhelm] Struve's confirmation of data. States that [Wilhelm] Olbers is dying. [H. C.] Schumacher is recovering.

Addresses last words before departing to Cape. Informs AQ that results concerning absorption of light will be in next London and Edinburgh Philosophical Journal. One will be sent to AQ. Reminds AQ of promise to write JH at Cape.

Expresses regret for not writing earlier. Thanks AQ for meteorological observations. Has complete series of observations from March 1835 to December 1836. Thanks AQ for reports on papers sent. Will depart in early 1838 and requests duplicates of all observations sent: one to England, one to the Cape. Apprises AQ of JH's work on double stars and nebulae.

Attached circular from Meteorological Committee of South African Literary and Philosophical Institution stating a change from 36 to 24 hours of hourly observation at solstices and equinoxes. Letter to AQ thanks for great work and requests AQ continue.

Thanks AQ for meteorological observations for September 1838 and other materials sent. Singles 12 and 13 November as extraordinarily clear. Observed a 'paucity of shooting stars' and an Aurora Borealis.

Thanks for duplicates of horary observations. Requests that AQ and his associates cease them after December 1838. Questions 'whether any and what' corrections are applied to observations. Has successfully seen second satellite of Saturn.

JH's brother-in-law John Stewart, who is delivering this letter, seeks admission to a printing establishment. Asks AQ to aid JS. Lists recently received letters. Glad that AQ has [C. F.] Gauss's apparatus. Discusses an experiment in photography.

Takes a moment to write. Sends various brochures and observations on magnetic intensity in Germany. Asks JH to give a copy of it to [Charles] Babbage and [Henry] Kater. Congratulates JH on being named correspondent to the Institute of France. Lost his father-in-law. Has asked [James] South to press construction of AQ's instruments, but no luck. Requests JH visit Edward Troughton and the instruments.

Announces second volume of translation of JH's Light is out in Paris. Is sending a copy. Work progresses slowly. Problems because of revolution. AQ's collaborator [P. F.] Verhulst is very ill. Will leave for Italy soon. Discusses his previous trip to Germany. Saw [William] Whewell. Has received Astronomical Society's memoirs.

Sends works for JH, the Astronomical Society, and several members. Worries about [P. F.] Verhulst. Asks for JH's recent observations. Has spent much time lately on the human laws. Thanks JH for seeing Edward Troughton and instruments. Has just heard that his friend Alexis Bouvard, who was like a father, is seriously ill.

Concerned about payment for instruments. Has read in newspaper that JH is preparing to study the southern hemisphere. Asks to keep in touch. Will soon go to Paris for transit instrument and another publisher for the translation of JH's work. Problems on account of Revolution.

JH's last letter before departure has brought AQ great pleasure. Has not received JH's memoir on absorption of light. Has mentioned JH's name in an attempt to explain the idea of Cambridge Reunion. Disappointed at not yet having received equatorial and mural circle. Asks for news of JH's observations.

Has JH's memoir on elliptical orbits of Saturn. Asks for JH's indulgence with lack of astronomy in annals. AQ has no big instruments. Has planted thermometers for experiments. Finally received transit instrument from [H. P.] Gambey.

Wonders if JH has received AQ's letters and works sent to the Cape. Sends more. Has been doing meteorological observations. Will send some if JH wishes. Mural circle and transit instrument finally in place. Problems with equatorial; therefore missed Halley's Comet.

Still has not heard from JH. Has put much effort into horary observations of solstices and equinoxes. Sends JH articles by AQ on temperatures of earth. Will send magnetic observations.

Thanks for two letters. Updates JH on observatories participating in horary observations. Proposes to reduce observations. Sends second part of Brussel's annals and other works. Discusses a phenomenon on 10 August. Mentions several observations of the Aurorae Borealis.

Welcomes JH back to England. Proof that AQ never ceased thinking of JH is that AQ never quit his horary observations. Has sent books to R.S.L. for JH. Has restarted his notices on meteors. Is determining their longitude in relation to Greenwich. [Richard] Sheepshanks brought AQ JH's portrait and bust.