Camerons were found on online military records from the Library and Archives Canada, entitled "British Military and Naval Records," (RG 8, C Series) (Index only).
The first Cameron card on Microfilm C-11799 was Image 1104; the example below is Image 1172:
Cameron, Alexander, Sergt. in late 103rd. Regt.
At present inmate of lunatic asylum, Toronto; his wife petitions to receive amount of pension undrawn by him.
Margaret Cameron to the Earl of Elgin.
Bathurst near Perth, C.W.
C. 500 [do not know what this means]
pp. 79, 78 [don't know what this references]