Thanks, Ricky ... just found that too!!!!
My hope is that the Parish register might give a bit more detail. I have a deep suspicion that Rebecca was actually registered as Rebecca THOMPSON but can not find a marriage of my William KIRBY with a Mary THOMPSON at, around or after that date. William had previously been married to a Frances and had at least three issue but she died in 1845.
My great-grandfather, Edward KIRBY, was born some years later and, from his birth certificate, it shows his mother as Mary KIRBY (formerly THOMPSON).
Hopefully the parish register can provide that little bit of gold-dust to solve the mystery!!!
Thanks for your help.
Ian.