I am looking for the marriage parish record between a William Dowling and Charlotte Boxall(?) in 1837. I believe that William Dowling (Dolling) was born in 1811 in Mid Lavant, although the 1841 census HO107/1104/7/3/Pg1 cites him born in 1816 in Sussex. His wife Charlotte in the 1841 census is 25, so again her birth year is approximately 1816. In the 1851 census (HO107/1652), Charlotte is a widow living at New Buildings, East Lavant, Westhampnett, Sussex with sons William 12, Edmund 10, John 8 and Elin 4. Charlotte is cited to have been born in Singleton (1814), Sussex - which is roughly only 2-3 miles from East Lavant. I can find no marriage on Family Search for a William Dowling (or variation) to a Charlotte in Sussex. Other trees on Ancestry have quoted Charlotte's maiden name as Boxall together with a marriage in Portsea, Hampshire to a William Dowling on 13 Nov 1837. Why would they have married in another county? Is this the right William and Charlotte? Any information on the Parish Marriage Record as quoted would be very much appreciated.
Many thanks for any help.