Hi Robert ... You are close ...
My Elizabeth Morton was b 1801 in Craigie, Ayrshire and emigrated 1853. Her Thomas (b 1826) married Janet Wilson 1848 in Riccarton, Ayrshire. They came to USA MI.
I have little of older Thomas Borland (b~1740s) other than marriage to Mary Dunn and at least 2 children Thomas (b 1765, married Elizabeth Anderson) and John (no other info ...)