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Henderson, Thomas in correspondent 
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From:
Thomas Henderson
To:
Sir John Herschel
Date:
[13 January 1832]
Source of text:
RS:HS 9.284
Summary:

Spent a pleasant time with G. B. Airy at Cambridge. The 'Melville' ship sails from Portsmouth on Thursday and he has been promised a passage to the Cape in it. Proposes to call on him tomorrow to discuss certain things.

Contributor:
John Herschel Project
From:
Thomas Henderson
To:
Sir John Herschel
Date:
[5 April 1833]
Source of text:
RS:HS 9.286
Summary:

Has taken some time to consider the climate at the Cape in response to JH's request. Gives details of the climate, suitability of site for observatory, and general conditions at the Cape. There is a reasonable library at Cape Town.

Contributor:
John Herschel Project
From:
Thomas Henderson
To:
Sir John Herschel
Date:
[27 April 1833]
Source of text:
RS:HS 9.287
Summary:

Has resolved to leave the Cape and soon after JH receives this letter he hopes to be in England. Will bring the barometer and the exterior thermometer. Saw Dr. Duncan Stewart yesterday.

Contributor:
John Herschel Project
From:
Thomas Henderson
To:
Sir John Herschel
Date:
[12 August 1833]
Source of text:
RS:HS 9.288
Summary:

Has written two letters from the Cape. Arrived three days ago. Will shortly proceed to Edinburgh. Has left the barometer on the ship. Compared this barometer with the one at St. Helena.

Contributor:
John Herschel Project
From:
Thomas Henderson
To:
Sir John Herschel
Date:
[6 September 1833]
Source of text:
RS:HS 9.289
Summary:

Proceeds to Edinburgh in the course of a few days and intends to compute the star declinations. Has some suggestions to offer before JH sails for the Cape. Would be glad to hear of the comparison of the barometer and thermometer. Left a [Thomas] Jones thermometer at the Cape.

Contributor:
John Herschel Project
From:
Thomas Henderson
To:
Sir John Herschel
Date:
[3 October 1833]
Source of text:
RS:HS 9.290
Summary:

Memorandum on the site of N. L. Lacaille's Observatory.

Contributor:
John Herschel Project
From:
Thomas Henderson
To:
Sir John Herschel
Date:
[16 June 1834]
Source of text:
RS:HS 9.291
Summary:

Is happy to hear of his safe arrival at the Cape and comfortably housed. Comments on two stars Alpha1 and Alpha2 Centauri.

Contributor:
John Herschel Project
From:
Thomas Henderson
To:
Sir John Herschel
Date:
[1 August 1835]
Source of text:
RS:HS 9.292
Summary:

Received his February letter and is pleased to hear that things are progressing. No one has seen Halley's Comet yet. His work on the reduction of the Cape observations is proceeding slowly. Had no idea he gave such a poor impression of the Cape climate. David Brewster and J. D. Forbes have not visited Edinburgh recently.

Contributor:
John Herschel Project
From:
Thomas Henderson
To:
Sir John Herschel
Date:
[29 November 1836]
Source of text:
RS:HS 9.294
Summary:

Pleased to hear that all is progressing well with JH. Regrets the discordance in the Parramatta Right Ascensions. Observed an occultation of Gamma Virginis in April. Has seen the method of determining the nadir point of a circle. Cape reductions suffered a setback last season as he had to lecture on mathematics.

Contributor:
John Herschel Project
From:
Thomas Henderson
To:
Sir John Herschel
Date:
[7 April 1837]
Source of text:
RS:HS 9.295
Summary:

Sending a few lines via Captain Basil Hall. Has sent his observations of the refractions of stars at lower altitudes than 5 degrees, to the R.A.S. Started work on determining the position of the stars from Baily's zodiacal catalogue. Government has authorized the printing of the observations.

Contributor:
John Herschel Project
From:
Thomas Henderson
To:
Sir John Herschel
Date:
[8 September 1840]
Source of text:
TxU:H/M-0271; Reel 1087
Summary:

Activities of Mr. Jones and [J. C.] Adamson in Edinburgh. Finished reducing all stars in N. L. Lacaille's Coelum australe stelliferum, but Catalog will not be finished before B.A.A.S. meeting. Will send it in portions to Francis Baily.

Contributor:
John Herschel Project
From:
Thomas Henderson
To:
Sir John Herschel
Date:
[21 July 1841]
Source of text:
RS:HS 9.296
Summary:

All N. L. Lacaille's observations have been reduced and a complete catalogue sent to Francis Baily to be incorporated into the catalogue of the R.A.S. Hopes Baily is recovering his health.

Contributor:
John Herschel Project
From:
Thomas Henderson
To:
Sir John Herschel
Date:
[31 January 1842]
Source of text:
RS:HS 9.297
Summary:

Has received a series of observations from Thomas Maclear on Alpha1 and Alpha2 Centauri. Comments on these observations and gives results made by the old circle.

Contributor:
John Herschel Project
From:
Thomas Henderson
To:
Sir John Herschel
Date:
[11 February 1842]
Source of text:
RS:HS 9.299
Summary:

Thanks for letter and printed address and for the favorable notice of his investigations into Alpha Centauri. Comments on these and some of his observations on other stars. Encloses a note of the position of seven circumpolar stars.

Contributor:
John Herschel Project
From:
Thomas Henderson
To:
Sir John Herschel
Date:
[4 April 1842]
Source of text:
RS:HS 9.300
Summary:

Gives the parallaxes of a few southern stars obtained from his own mural circle. Has sent his memoir on Alpha Centauri to the R.A.S.

Contributor:
John Herschel Project
From:
Thomas Henderson
To:
Sir John Herschel
Date:
[2 May 1842]
Source of text:
RS:HS 9.301
Summary:

Sending the results of his calculations of the parallaxes of the southern stars. Has recommended these stars to Thomas Maclear to observe.

Contributor:
John Herschel Project
From:
Thomas Henderson
To:
Sir John Herschel
Date:
[4 October 1842]
Source of text:
RS:HS 9.302
Summary:

Has had a reply from Thomas Maclear stating that all work has ceased at the Cape Observatory until the work on calculating the Arc of the Meridian has finished. F. W. Bessel has expressed a wish that Centaure should be observed with a heliometer. Wishes a good heliometer could be sent to the Cape.

Contributor:
John Herschel Project
From:
Thomas Henderson
To:
Sir John Herschel
Date:
[5 April 1843]
Source of text:
RS:HS 9.303
Summary:

Sending readings from his observations of the comet.

Contributor:
John Herschel Project
From:
Thomas Henderson
To:
Sir John Herschel
Date:
[21 April 1843]
Source of text:
RS:HS 9.304
Summary:

Regarding the recent comet, believes it to be the one of 1668. Does not feel competent to comment on the proposal to change the names and boundaries of the constellations.

Contributor:
John Herschel Project
Document type
Transcription available