Hello there!
Henry Bensley Allen was the brother of my Gt gt gt grandmother, Frances Allen and was one of the witnesses at her wedding. They were actually from Hindringham in Norfolk, Wyndonham is a mis-reading by the transcriber (it stumped us for a while too!). They were the children of Thomas Allen and Elizabeth nee Bensley who were married 29.12.1814 in Great Fransham, Norfolk. Thomas' parents were John Allen from Hindringham, and Frances Carrington from Walsingham. Elizabeth's parents were Henry Bensley & Mary Fisher (this may be Riches as both families were in the area at the time, but it looks more like Fisher). Elizabeth also had a twin brother, Henry.
You can trace the Carringtons back on the IGI as well as Frances Carringtons Mother Ann's family, Shorting, which goes back to c1595! (although I would like to verify the records myself in case of mistakes!).
If you would like more information about Henry Bensley Allen & his brothers & sisters let me know.
Debbie