Provides last list of errors and explains JH's role in detecting them [see GA's 1863-5-26]; is worried about the task of proofreading.

Comments on GA's activity in correcting the calculation errors [see GA's 1863-6-2].

Has spent much time on figures and annotations for JH's nebula catalogue [see GA's 1863-6-5]; JH needs information from a paper in GA's hands.

As JH has made minor changes in many calculated results, the proof sheets cannot be easily compared with the calculation sheets [see GA's 1864-2-6].

Saddened by the poor treatment of W. H. Smyth [see GA's 1865-10-18].

Approves of GA's development of a new type of eyepiece for use with the Royal Observatory's transit circle telescope.

Comments on William Whewell's replacement on the Royal Observatory's Board of Visitors.

Not well enough to attend Visitation Day at the Royal Observatory, but would be pleased if GA would invite JH's son John.

Comments on the possibility of employment in India for GA's son, Hubert.

Thanks for gift sent to JH's daughter Amelia; comments on William Petrie's number mysticism with the Great Pyramid.

Is arguing for the development of a British metrical system based on the length of the polar axis of the earth.

Was surprised at the large vote in support of a parliamentary bill to abolish the British Standard of weights and measures; JH hopes bill will not pass.

Thanks GA for receipt of some Royal Observatory publications; is still pushing the British metrical standard based on the length of the earth's polar axis [see JH's 1860-3-2].

JH wants to avoid using the meter in England; asks GA for the results of A. R. Clarke's calculations on the figure of the earth [see GA's 1863-10-7].

Has been asked to reweigh the damaged Parliamentary standard pound weight; thinks that W. H. Miller would be a more suitable person to do the job.

Is trying to discover the train connections that will allow JH to come to a meeting of the Standards Committee without coming to London overnight. 'Catalogue of Nebulae' is now in proof state [see GA's 1863-10-9] and needs to be checked.

Is now too ill to come to the meeting of the Standards Committee; replies to GA's queries about how to clean up the pound [see GA's 1864-2-8].

Is unable to attend another meeting of the Standards Committee, due to severe illness; describes the best way to pack the standards away, and talks about the strange behavior of gallic acid.

Will miss yet another meeting of the Standards Committee due to illness [bronchitis]; W. H. Miller has brought JH up to date on the activity of the committee, and JH agrees with what is being done.

Is very upset that JH's name has been attached to a group that wishes to import the 'French metrical system' into Britain; JH urges petitions or whatever is needed to retain the British system.