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Howlett, Frederick in correspondent 
Herschel, John in addressee 
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From:
Frederick Howlett
To:
Sir John Herschel
Date:
[10 January 1861]
Source of text:
RS:HS 10.14
Summary:

Expressing sympathy on the illness of Margaret Louisa Marshall (JH's daughter). Would like to hear the latest news by the bearer. Would JH append his name to the enclosed form.

Contributor:
John Herschel Project
From:
Frederick Howlett
To:
Sir John Herschel
Date:
[25 January 1864]
Source of text:
RS:HS 10.15
Summary:

Comments on the sun spots he has been observing, and some new phenomenon. Any chance of a visit from JH?

Contributor:
John Herschel Project
From:
Frederick Howlett
To:
Sir John Herschel
Date:
19] March [1864
Source of text:
RS:HS 19.227
Summary:

Drawing of 'the singular mottled appearance of portions of the Sun's disk ... March 19th 1864'.

Contributor:
John Herschel Project
From:
Frederick Howlett
To:
Sir John Herschel
Date:
[22 March 1864]
Source of text:
RS:HS 10.16
Summary:

Has returned James Nasmyth's letter and has never seen Warren de La Rue's letter. Comments on Nasmyth's 'willow leaves.' Have been observed at Greenwich Observatory. Thanks for his remarks on the best kind of eye-piece.

Contributor:
John Herschel Project
From:
Frederick Howlett
To:
Sir John Herschel
Date:
[27 April 1864]
Source of text:
RS:HS 10.17
Summary:

Hopes the JH's are all well. Would like an eye-piece made by Mr. Cook[e] or any leading optician on the principles of JH as laid down in his paper in R.S.P.T. Shall he refer the optician to this paper?

Contributor:
John Herschel Project
From:
Frederick Howlett
To:
Sir John Herschel
Date:
[9 May 1864]
Source of text:
RS:HS 10.19
Summary:

Is grateful for his communication on the proposed solar eyepiece. Will call round on his way to town to ascertain if he can leave the manuscript with [Thomas?] Cooke, the instrument maker, so that he can have some idea of the work involved. James Nasmyth will pay attention to screen projection.

Contributor:
John Herschel Project
From:
Frederick Howlett
To:
Sir John Herschel
Date:
[27 April 1867]
Source of text:
RS:HS 10.21
Summary:

Regrets he was out when JH called. Thanks for the elegant verses. Will be moving shortly to a place nearer London, which promises much. Gives notes on some more sun spots, which he has recently observed.

Contributor:
John Herschel Project
From:
Frederick Howlett
To:
Sir John Herschel
Date:
[4 May 1867]
Source of text:
RS:HS 10.20
Summary:

Is uncertain if he has detected the lightlines on the solar surface to which JH has called attention, but there does seem to be something unusual there. No sun spots are visible just now.

Contributor:
John Herschel Project
From:
Frederick Howlett
To:
Sir John Herschel
Date:
[13 October 1868]
Source of text:
RS:HS 10.22
Summary:

Much obliged for his kind notes on sunspots; there has been a wonderful variety lately. Will make a study of the Julian dates. Can see the Crystal Palace fireworks splendidly from his house.

Contributor:
John Herschel Project
From:
Frederick Howlett
To:
Sir John Herschel
Date:
[28 April 1870]
Source of text:
RS:HS 10.23
Summary:

Has no idea whether the sunspots appeared suddenly or gradually. The Kew people may be able to help in this matter. Comments on some more sunspots.

Contributor:
John Herschel Project
From:
Frederick Howlett
To:
Sir John Herschel
Date:
[25 August 1870]
Source of text:
RS:HS 10.24
Summary:

Intends bringing the subject of sunspots before the B.A.A.S. next September and would therefore like JH's views on whether in his opinion these spots are mechanical or magnetic. Also any other comments would be welcome.

Contributor:
John Herschel Project
From:
Frederick Howlett
To:
Sir John Herschel
Date:
[7 September 1870]
Source of text:
RS:HS 10.25
Summary:

Is grateful for JH's note. Agrees with him about the mystery of the sunspots. Is awaiting some heliographs from Ely. Is inquiring from Kew as to any recent magnetic disturbances that may coincide with the appearance of the sunspots. Is grateful for Alexander Hershel's information.

Contributor:
John Herschel Project
From:
Frederick Howlett
To:
Sir John Herschel
Date:
[5 April 1871]
Source of text:
RS:HS 10.26
Summary:

Is anxious to have an astronomical eye-piece based on JH's principles. Encloses communication from Messrs. Horne and Thornthwaite, who would like details for their employee, [W.?] Ackland, to work from.

Contributor:
John Herschel Project
From:
Frederick Howlett
To:
Sir John Herschel
Date:
[10 April 1871]
Source of text:
RS:HS 10.27
Summary:

Is grateful for his reply. Hopes he is feeling better. Escaped worst of the winter by expedition to Algeria, though the results were disappointing. Comments on some of his observations. Feels sure [W.?] Ackland will be able to construct a suitable eyepiece.

Contributor:
John Herschel Project