Presuming that Alfred Pocock married twice.
I have him on the Electoral Roll in Melbourne with his wife Agnes until 1937.
In 1942 there is an Alfred James Pocock at an address in Glenferrie Rd, Melbourne.
On a different Electoral Roll for 1942 there is a Margaret Edna Davis Follet at the same address.
From then until 1975 Alfred and Margaret (who is now Pocock) are on the same electoral Roll entries.
There is a marriage for them in 1947.
In 1977 Alfred is at the same address but on his own.
Margaret Pocock died in 1975.
I presume Albert and his first wife Agnes divorced as she died in 1977.
Where could I find out about a divorce?