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d'Arrest, Heinrich Louis in correspondent 
Herschel, John in author 
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From:
Sir John Herschel
To:
Heinrich Louis d'Arrest
Date:
[17 October 1862]
Source of text:
TxU:H/L-0135; Reel 1054
Summary:

Nebulous nature of some stars. Recent reports on variability of some nebulae.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Heinrich Louis d'Arrest
Date:
[17 October 1862]
Source of text:
TxU:H/M-0347.2 & TxU:H/M-0350.2; Reel 1087
Summary:

Reduction of JH's catalog of nebulae will not be completed before Christmas. HA's success in discovering nebulae and novae. Has compared positions of all nebulae observed by both JH and William Herschel; very few show evidence of shift. Thanks for offering HA's observations, but space in catalog is too limited.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Heinrich Louis d'Arrest
Date:
[5 March 1863]
Source of text:
TxU:H/L-0136; Reel 1054
Summary:

JH received and will insert HA's list of nebulae into JH's catalogue. Progress of catalogue. Wishes JH had earlier knowledge of [G. F. J. A.] Auwer's reduction of William Herschel's nebulae, which JH just received.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Heinrich Louis d'Arrest
Date:
[24 April 1863]
Source of text:
RAS:JH Archive 12/1.8.9; Reel 10
Summary:

[JH's summary of letter] Instructions and corrections relative to data on nebula for JH's catalogue.

Contributor:
John Herschel Project