205 
with admiration for the exalted qualities of Horsley, induced 
the learned historian of the Deanery of Doncaster, on the 
discovery of the note in the Bodleian, to espouse the forgotten 
cause of Greetland, which was also the cause of the object 
of his veneration ! 
Society will thank Mr. Hunter for his valuable contribution ; 
his discovery shows, in this particular point, the veracity of 
Camden ; it illustrates the judgment of Horsley ; and proves 
the existence of a Roman town within the parish of Halifax. 
Slack will continue to be the site of Cambodunum ; and, this 
being the case, we have, at Greetland, a station without a 
name. But it is a singular coincidence that, in Brigantia, 
we have a town without an ascertained site. Richard, of 
Cirencester, mentions it under the name of Galacum or 
Galgacum, and Kendal has, on no decisive authority, been 
suggested as the site. With the superior claims of Greetland, 
and the somewhat similar sound of its name, I see no present 
reason why the station there should not henceforth be 
recognised as the Galacum of Ricardus Coriensis.* 
Mr. W. S. Ward read the following communication : — 
ON THE ROTATION OF THE PLANETS. BY CAPTAIN A. DRAYSON, 
ROYAL ARTILLERY, PROFESSOR OF ASTRONOMY, IN THE 
OBSERVATORY, WOOLWICH. 
There are in the solar system at least seven primary 
planets which "Rotate" or turn round an axis. These 
planets vary considerably in size and in their distance from 
the sun, and there appears to be no law in connection with 
* As I find it impossible, within the compass of one paper, to do that 
justice to the subject which I think it deserves ; or to compress, without 
losing its force, the mass of materials on the Roman affairs of our neighbour- 
hood, which I have been for years collecting, and am collecting still ; I shall 
be under the necessity of deferring, to a future opportunity, the continuation 
of this interesting inquiry. 
