The death indexes for James Sinton/Linton Telford states one is married at death the other a widower.Your James's wife Daisy Beatrice died 8/2/1937 age 47 making your James the widower.
Surname: TELFORD Given Names: James Sinton Date: 1959-03-23 Sex: M Age: 77y Status: W Relative: Relative 2: Residence: Glenburnie Death Place: Mount Gambier District Code: Gre Symbol: H Book: 888 Page: 1846 Cross Reference:
This James born 1882 and is buried Lake tce Cemetery mt gambier Section K, Plot 997 Daisy Beatrice is also buried at Lake Tce Cemetery but is buried in section B plot 324. You could try contacting the mt Gambier Council for burial records by email to find out if there is any more info .
The record below is the other James Sinton Telford which I cannot find him in a cemetery yet. Not all cemetery records are on line.
Surname: TELFORD Given Names: James Sinton Date: 1960-04-12 Sex: M Age: 70y Status: M Relative: Relative 2: Residence: Moorak Death Place: Moorak District Code: Gre Symbol: Book: 905 Page: 2125 Cross Reference: B1890