Thank you to everyone who has contributed to this thread, I think the mystery has been solved.
She has no connection to Amory!
I have just spoken to Fred's great nephew (AKA my father in law) who has been giving some thought to the photo and looking through his huge photo collection.
He has now emailed me about 300 family photos I have never seen before

. They belonged to his aunt.
Amongst the photos are about a dozen with the same girl in them. He said the girl (name unknown) was a neighbour/family friend of his aunt who moved to Yorkshire. They used to visit family in Wolverhampton regularly and must have brought her with them on a visit.
I will post some of the photos shortly to see if you agree it is the same girl.