From:
John R. Hind
To:
Sir John Herschel
Date:
[23 October 1869]
Source of text:
RS:HS 9.397
Summary:
His last note on the Julian period puzzled him. Has not taken many double star measurements, but will send on a few later. Has not finished the ecliptical charts yet. Regarding a planet more distant than Neptune.
Contributor:
John Herschel Project