1851 newcastle please

[flower fairy]

Hi I am not sure what the chances are of finding this couple but am completely stuck on this line at the moment. I am trying to find James and Mary Burns in Newcastle in 1851 but do not know where either of them were born or what there ages would be although possibly 50-60's.  Their daughter was my 4x's great grandmother and she married in 1841 and although I have tried to find them in 1841 when she would have still been at home I have had no luck. Any info however small would be a great help. Thank you, Nicky