If you have access to the worldwide ancestry there are some electoral records on there in 1912 and 1913 and a death record for a John Lockhart Morton
Edit: Its for a William John Lockhart Morton so probably not yours but they come under
Australia, Electoral Rolls, 1903-1980 in Wimmera, Victoria, Australia 1912 & 1913, and
Australia, Death Index, 1787-1985 for a death between 1916 and 1925.
I do not access to fuller details