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O'Callaghan, P. in correspondent 
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From:
P. O'Callaghan
To:
Sir John Herschel
Date:
[31 January 1858]
Source of text:
RS:HS 13.156
Summary:

Sends a copy of [John?] Dalton's letter for which he is obliged. Expresses appreciation of his recent visit to Kent and Sussex.

Contributor:
John Herschel Project
From:
P. O'Callaghan
To:
Sir John Herschel
Date:
[30 July 1858]
Source of text:
RS:HS 13.157
Summary:

Heard from Louisa [JH's daughter] that JH was interested to hear about the [Leeds] Literary and Philosophical Society. Gives details and recent lectures. Would be pleased for JH to give a lecture.

Contributor:
John Herschel Project
From:
P. O'Callaghan
To:
Sir John Herschel
Date:
[15 August 1858]
Source of text:
RS:HS 13.158
Summary:

All are exceedingly obliged by JH's kind thought for the [Leeds] Literary and Philosophical Society. Subject JH mentions will be most interesting. Paper should not be too long. News from Ingwell most comforting.

Contributor:
John Herschel Project