Is still not happy with the earth's axis as a source of standard length; sends JH the results of A. R. Clarke's calculations on the figure of the earth [see JH's 1863-10-8].

Responds to JH [see JH's 1863-6-2] about basic rules for admission to the observatory [for JH's future guidance]; GA discourages the visit of ladies 'who understand nothing and learn nothing.'

Did JH receive G. F. J. A. von Auwers's catalog of JH's and William Herschel's nebulae?

Sends copy of G. F. J. A. von Auwers's catalog of JH's and William Herschel's nebulae. Observatory has another copy. Notes odd lines seen in 'Refraction Spectra of 11 stars.'

Refraction spectra of six stars exhibit lines corresponding with 'Solar Line F.'

Expect some errors in calculations of positions for JH's catalogue of nebulae. Suggestions on format.

Sends a final accounting for the calculating work done at the Royal Observatory on JH's nebula catalogue [see JH's 1863-2-7].

Addresses each error JH discovered in reduction of JH's catalogue of nebulae [see JH's 1863-5-15].

Invites JH to R.A.S. dinner on 9 Jan. to meet Sir G. C. Lewis.

Has seen colored fringes on clouds described, and explained, in a journal. Does GA accept the explanation?

Explains how to detect errors in catalogued positions of stars. List of new nebulae in [G. F. J. A.] Auwers's catalogue.

Sends GA [see GA's 1863-11-21] JH's copy of the Melbourne telescope correspondence and reports; needs information from GA and Edwin Dunkin about the sun's motion, although JH questions some of Dunkin's work.

Thanks GA for the papers sent; asks GA to review enclosed note on solar motion [see JH's 1863-11-22].

Comments on the ease of calculation in geodesy in JH's version of the English system of units, and asks GA for some clarifications as JH prepares the seventh edition of his Outlines Astr.

Offers a few ideas to GA [see GA's 1863-2-9], but does not have a coherent explanation.

Anxious to receive final sheets of nebula catalogue from GA [see GA's 1862-11-19], as JH wants to enter the descriptions and complete the work.

Once again anxious about completion of nebula catalogue, and about cost over run [see Edward Stone's 1863-1-14].

Acknowledges receipt of nebula catalogue sheets from GA [see GA's 1863-2-6]; apologizes for JH's anxious letter [see JH's 1863-2-6].

Has found a few minor errors in the calculations checked so far [see GA's 1863-2-6]; comments on magnetic tracings JH received from GA.

Might have saved JH some work if he had known what G. F. J. A. Auwers was doing [see GA's 1863-2-20]; has found some more errors in nebula calculations.