Hi Willow,
Checked LDS for marriage
Hugh COLLINS married Mary Ann CAUGHY Kirkholm, Wigtown 31st May 1840
Checked 1851 census found following details. You will see that Mary Ann is not showing with her family. These details were obtained from Dumfries & Galloway Council site.
Good luck
Snowwhite
Name: COLLINS, Ann
Address: Meikle Pinminnoch (896)
Parish: Portpatrick
Relationship: daughter of Hugh
Marital Status:
Occupation:
Age: 8
Born: Kirkcolm Wgt
Household No: 7/3
Name: COLLINS, Ellen
Address: Meikle Pinminnoch (896)
Parish: Portpatrick
Relationship: daughter of Hugh
Marital Status:
Occupation:
Age: 2
Born: Portpatrick Wgt
Household No: 7/3
Name: COLLINS, Hugh
Address: Meikle Pinminnoch (896)
Parish: Portpatrick
Relationship: head of household
Marital Status: married
Occupation: LABOURER Farm
Age: 35
Born: Kirkcolm Wgt
Household No: 7/3
Name: COLLINS, Hugh
Address: Meikle Pinminnoch (896)
Parish: Portpatrick
Relationship: son of Hugh
Marital Status:
Occupation:
Age: 4 months
Born: Portpatrick Wgt
Household No: 7/3
Name: COLLINS, Jean
Address: Meikle Pinminnoch (896)
Parish: Portpatrick
Relationship: daughter of Hugh
Marital Status:
Occupation:
Age: 4
Born: Kirkcolm Wgt
Household No: 7/3
Name: COLLINS, John
Address: Meikle Pinminnoch (896)
Parish: Portpatrick
Relationship: son of Hugh
Marital Status:
Occupation:
Age: 6
Born: Kirkcolm Wgt
Household No: 7/3
Name: COLLINS, Mary
Address: Meikle Pinminnoch (896)
Parish: Portpatrick
Relationship: daughter of Hugh
Marital Status:
Occupation:
Age: 10
Born: Kirkcolm Wgt