Welcome to Ireland Reaching Out!
I was looking for a civil marriage record for the marriage of john and Margaret but I did not see a record so possibly they did not register the marriage. The 1872 civil birth record for Marianne indicates the family was living in the Drogheda workhouse.
I did not find a John Kearney/Carney baptismal record in Stamullin parish. There were a number of John Kearney baptismal reocrds across Co. Meath in the 1830s. Below is a possible baptismal record for Margaret Walsh from the subscription site Roots Ireland.
Name:Margaret WalshDate of Birth:
Date of Baptism:25-Jan-1844Address:Not RecordedParish/District:STAMULLINGender:FemaleCountyCo. Meath
Father:John WalshMother:Mary ReadOccupation:
Sponsor 1 /
Informant 1:Catherine Read