Looking for George Sneddon Edgar B 1875

George Sneeddon b 1875 at Steelhead, Keir. in the County of Dumfries.I have a picture of him on a post card sent from Transvall in 1930 to his father William Charteris Edgar b 1847 in Dunscore d 1923 married to Elizabeth Sneddon b 1854 in Lochmabem. Dumfriesshire d 1925 at Sanquhar. George may have been on his way to Australia info needed please to derek.