From:
W. S. Mackay
To:
Sir John Herschel
Date:
[1844-1 or later]
Source of text:
RAS:JH Archive 3/1.1.16; Reel 7
Summary:
Extract [in JH's hand] from WM's letter describing increasing brightness of Eta Argus. [JH annotation: See 'Ast. Soc. Notices Jan 12/44']
Contributor:
John Herschel Project