From:
Thomas Maclear
To:
Sir John Herschel
Date:
15] December [1835
Source of text:
RS:HS 12.204
Summary:
Captain [F. W.?] Grey has just been to the Observatory as he wished to ascertain the error of his chronometers. Outlines the signalling devices adopted. Fine definition last evening. Will call on Saturday if convenient.
Contributor:
John Herschel Project