G'Day Richard,
Yes, I have come to same conclusion as you, that James (1769) was a child of Richard and Elspeth. Mainly due to fact that there is the gap between the marriage and the first recorded child I found, Margaret in 1773. Also the similarity in children's names. 'Richard' was not handed down any of the other lines other than yours and once in Thomas's. Thomas, my 3G GF, had a Eppy, James, Janet, Richard, Robert, John, Jacob, Thomas, David, Jane and Mary. James did have a son Richard but I have lost that line as James and his wife Elisabeth Edgar went to NY, where she died in 1852.
I can assume you have seen my 'Dicksons of Dumfriesshire' tree then. I don't have a John b 1846 in your line but a James. A John was born in 1852ish according to the 1861 census. Although I must admit I have not delved deeply into your lines as yet. You can email me at (*) if you like.
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