Hi Bellbird,
At a quick (very!) glance, there are 3 possibilities that I've seen on IGI (
www.familysearch.org):
1) Jane Ackerman
Birth: 1840 Bridport, Dorset, England
Parents:
Father: Henry Ackerman
Mother: Martha Chalker
2) Jane Akerman
Christening: 02 NOV 1843 Broadwinsor, Dorset, England
Parents:
Father: Samuel Akerman Family
Mother: Sarah
3) Jane Ackerman
Birth: 1846 Mosterton, Dorset, England
Parents:
Father: David Ackerman
Mother: Selina
You might also check the Dorset OPC site (
http://www.opcdorset.com/) for the parishes listed here to see if they have marriage records, and IF they contain the couple you're looking for...otherwise you might have the unenviable task (trust me, I've done this one before...) of checking EVERY Dorset parish that has an OPC to see if you can find her. That being said, using ctrl-f to find a surname is a heck of a lot easier than ordering and searching parish registers which are hand-written!!!
Hope this helps,
Regards,
Patricia