During this October
term I had four pupils: Neate, Cankrein, Turner (afterwards 2nd
wrangler and Treasurer of Guy's Hospital), and William Hervey (son of
the Marquis of Bristol). In the Lent term I had four (Neate, Cankrein,
Turner, Clinton). In the Easter term I had three (Neate, Cankrein,
Turner).

"My daily writing of Latin commenced on Oct. 27th. In November I began
re-reading Sophocles with my usual care. In mathematics I find
investigations of Motion in a resisting medium, Form of Saturn, Draft
of a Paper about an instrument for exhibiting the fundamental law of
refraction (read at the Philosophical Society by Mr Peacock on
Nov. 10th, 1823), Optics, Solid Geometry, Figure of the Earth with
variable density, and much about attractions. I also in this term
wrote a MS. on the Calculus of Variations, and one on Wood's Algebra,
2nd and 4th parts. I have also notes of the temperature of mines in
Cornwall, something on the light of oil-gas, and reminiscences of
Swansea in a view of Oswick Bay. In November I attended Professor
Sedgwick's geological lectures.

"At some time in this term I had a letter from Mr South (to whom I
suppose I had written) regarding the difficulty of my telescope: he
was intimately acquainted with Tulley, and I suppose that thus the
matter had become more fully known to him. He then enquired if I could
visit him in the winter vacation. I accordingly went from Bury, and
was received by him at his house in Blackman Street for a week or more
with great kindness. He introduced me to Sir Humphrey Davy and many
other London savans, and shewed me many London sights and the
Greenwich Observatory. I also had a little practice with his own
instruments. He was then on intimate terms with Mr Herschel
(afterwards Sir John Herschel), then living in London, who came
occasionally to observe double stars. This was the first time that I
saw practical astronomy. It seems that I borrowed his mountain
barometer. In the Lent term I wrote to him regarding the deduction of
the parallax of Mars, from a comparison of the relative positions of
Mars and 46 Leonis, as observed by him and by Rumker at Paramatta. My
working is on loose papers. I see that I have worked out perfectly the
interpolations, the effects of uncertainty of longitude, &c., but I do
not see whether I have a final result.

"In Jan. 1824, at Playford, I was working on the effects of separating
the two lenses of an object-glass, and on the kind of eye-pi