David & Eliza Jane were born in Ireland. Sarah was from what I know their first child born in Scotland and this is what I have for Sarah's birth:
1857 Births in the Parish of Kirkcolm in the County of Wigtown, page 1
Surname & Name: Rainey, Sarah
When & Where Born: 1856 December Fifteenth, 8 h pm Balquharrie, Kirkcolm
Sex: F
Name, Surname & Rank or Profession of Father: Samuel Rainey, labourer
Name & Maiden Surname of Mother: Mary Rainey maiden name Brown
Signature, Qualification & Residence of Informant if out of the house when Birth occured: Samuel Rainey his X mark father not present, Arch McKinney registrar witness
When & Where Registered & Signature: 1857 January 3 at Kirkcolm, Arch McKinney Registrar.