Hello Thomas from another Thomas who currently lives to the south of Melbourne in Australia.
Yup, I'm aware of James Goodall born 25th November, 1805 at Auchterderran and who married Ann Millar. Names of their kids tie very neatly with Alexander Goodall who married Isabella Welsh on 21st December, 1804.
As a matter of interest, (and you being a Welsh!), was Isabella the daughter of Thomas Welsh (?Welch) and Elspeth Dickson?
Have made a posting a short time ago. Hope it helps,