Hi Griz
The latest records of marriages that I have for Frodsham St. Lawrence are
31/3/1823 Thomas Pope and Martha Penkerman
31/3/1824 Joseph Pope and Elizabeth Ball
sorry I cannot help any further but the index I have is not complete to 1837 in all areas.
I would contact the records office asap, I have seen many instances of mothers of illegitimate children although not naming the father, they leave a clue as to his ID sometimes with an unused middle forename for the child.
peterbennett