This is interesting as I also have a family that resided at Cottage Garth in the 1851 Census
1851 Marown ?Cain, Thomas, head, married
Cain, Christiana, wife, married
Children: John, Ann and Jane
Steele(s), Richard, stepson

The Richard Steele above married a Margaret Corlett in 1857. Margaret's father was Simon Corlett on her death certificate, her mother is beleived to be Ann (nee Skeally)

Any relation to your family of Corlett's?