Inviting JH to his house if he attends the meeting of the B.A.A.S. Proposes to visit JH in London.

Observations on the work of S. D. Poisson and P. G. le D. Pontecoulant. Is JH's 20-ft. telescope any use for measuring angles and distances? Discussion of solar spots.

Encourages GA to consider favorably the offer of Hugh Percy [Duke of Northumberland] of donating a telescope to Cambridge Observatory.

Copy of letter to Hugh Percy (3rd Duke of Northumberland) stating that the Duke's offer of a refracting telescope of great power, to Cambridge Observatory would be a valuable gift. To JH: Remarks on gift of telescope, planet reduction money, and on his geological exploration of the Charnwood Forest.

Has visited Hugh Percy (3rd Duke of Northumberland) at Buxton, who suggests that JH approaches R. A. Cauchoix for the glass for the new telescope.

A note along with letters from R. A. Cauchoix, the telescope maker, and [J. C. Spencer,] Lord Althorp, about the B.A.A.S.; JH is trying to clean up observation reports before leaving for the Cape.

Further about the telescope to be donated by Hugh Percy [see JH's 1833-8-15], along with a promise that JH will write to R. A. Cauchoix about the telescope.

More about arrangements with R. A. Cauchoix and the telescope for Cambridge Observatory; JH also comments on the state of his nebula work.

Further discussion of the telescope being donated by Hugh Percy (3rd Duke of Northumberland).

Summary of the letter of same date sent to JH at Slough (HS.1.60).

Hugh Percy has approved the arrangements, which JH had made with R. A. Cauchoix [see JH's 1833-9-29].

Has not been requested to settle the affair about Henry Taylor and the Stephen Groombridge business. Would JH send him what he has ready for printing, with directions? Observations on the 4th satellite of Jupiter.

Observations on the weather of the past winter. 42 Virginis. Printing of [Stephen] Groombridge's catalogue. Has written article for the Penny Cyclopaedia. Refracted light in prisms. Machine for polarization of the sky. Petition to Parliament to abolish religious tests for degrees at Cambridge.

Summary of GA's 1834-4-24, with additional information that he has written a book entitled Gravitation. Confusion over 42 Virginis. Affair between James South, and Edward Troughton and William Simms has been referred to arbitration. Experiments on Newton's rings by transmission. Letter to Thomas Maclear about his mural circle. Saw the eclipse of 16 July. Tarnish of JH's mirrors. R. A. Cauchoix's delay with telescope. [The final two pages of this letter are from Richarda Airy to Margaret Brodie Herschel.]

Abstracts of barometrical pressure in various parts of the earth. Has used James South's equatorial with Richard Sheepshanks's clockwork attached. Constitution of Paris Observatory being changed. D. F. J. Arago's experiments on glass and metal. Humphrey Lloyd's experiments on reflected light. Edinburgh's Observatory site likely to be changed. John Pond (Astronomer Royal) has been asked to resign. Thomas Maclear's Cape circle. Reasons for the delay in delivery of R. A. Cauchoix's telescope to Cambridge. House of Lords and Commons burnt down.

Has just been made president of the R.A.S. No news of John Pond's retirement. R. A. Cauchoix's telescope has arrived. Printing of his 1834 observations are well advanced.

Describes the tests and adjustments JH has recommended to Thomas Maclear to try to remove anomalies from the functioning of the transit circle at the Royal Observatory, Cape of Good Hope; also comments on the beauty of some southern nebulae.

Sends his 1834 observations. Has received JH's weather observing instructions. Likely to accept the post of Astronomer Royal when John Pond resigns. Further remarks on new telescope and of E. J. Cooper's (near Sligo) - planetary disks - errors of divisions of circles. Possibility of small observatory in Upper Canada.

Congratulates GA on being honored by H. M. Government [GA was offered a knighthood, which he declined], and of being appointed Astronomer Royal, and further tells GA about some of JH's observations, and the instruments in use [letter finished 11 Oct.].

Past difficulties and faults with running of Royal Observatory. Hopes Halley's Comet has been observed. Further information on the telescope presented to Cambridge Observatory by Hugh Percy (3rd Duke of Northumberland). James Challis has succeeded GA at Cambridge. Proposed new railway near Royal Observatory and its effect on observations.