Thanks for the help. It is definitely not John J and Margaret Cowan line as I have them traced to New Brunswick. I found another marriage on the site you suggested for John J and Margaret Halliday at Dumfries but no records of children.
I am pretty sure the Dr. John I am looking for is John J born March 19, 1979 at Hoddam, which I think includes Ecclefechen.
The site you gave me lists other siblings for Dr. John are Mary born, 1799, David born 1802, Margaret born 1804 and William born 1807. All of these list their father as John Jardine and no mother is listed. All are listed as born at Hoddam.
Don