Seoras, upon doing some further research, I think that I spoke too soon earlier and for that I apologize. I have recently been able to find the following children for James Wilson and Margaret Harrower - Mary, James, Robert, Charles, Alexander, Elisabeth, and Charlotte. I have the following information for the children -
Mary Willson
Baptism/Christening: 11 Feb 1753, Tillicoultry, Clackmannanshire
Parents: James Willson and Margarat Harrower
James Willson
Baptism/Christening: 19 Jul 1755, Tillicoultry, Clackmannanshire
Parents: James Willson and Margret Harrower
Robert Willson
Baptism/Christening: 08 May 1757, Tillicoultry, Clackmannanshire
Parents: James Willson and Margret Harrower
Charles Willson
Baptism/Christening: 15 Apr 1759, Tillicoultry, Clackmannanshire
Parents: James Willson and Margret Harrouer
Alexander Willson
Baptism/Christening: 19 Apr 1761, Tillicoultry, Clackmannanshire
Parents: James Willson and Margret Harrower
Elisabeth Wilson
Baptism/Christening: 10 Mar 1765, Tillicoultry, Clackmannanshire
Parents: James Wilson and Margret Harrower
Charlotte Wilson
Baptism/Christening: 12 Apr 1767, Tillicoultry, Clackmannanshire
Parents: James Wilson and Margaret Harrouer
So, yes, I do now have those other children and more. I included the parents names in the above info to show the spelling differences. Any additional information on James Wilson (Willson?) is appreciated!
Cheers, caliscot