Hi Noel
The family still look to be in Scotland in 1861. From the transcript, I think this is them:
Peter Mackie 69, builder master, Gaibertown, Wigtownshire
Jessie Mackie 45 b. Dumfries
Margt Mackie 21
James Mackie 18
George Mackie 16
Jane Mackie 14
Peters Mackie 5
Jane Brown 66 visitor b. Dumfries
Address: Main Street, Newton Stewart, Wigtownshire
With James, son, being your direct line, you may not have viewed Peter's 1855 birth cert. For that first year of Scottish official registration, cert ran over two pages of the register and included more info that normal. For births, it should give you date and place of parents' marriage, ages and where they were from. How many children they had (alive/deceased and girls/boys).
Monica
