Grahame William Nicholls died 19 December 1972 at Vancouver, buried on 31 January 1973 at Mountain View Cemetery, Vancouver. He was in the Masonic section so there may be some records around for that too.
He was a Bank Messenger in 1963 living at 2915 Forty Third Avenue, Vancouver South. There was a Mrs Dorothy Nicholls living there so presumably she was his wife.
There is a Dorothy Nicholls dying in 1992 (buried 2 May) in Mountain View as well that could be his wife. Actually, same grave, so it is.