In Margrave Of The Marshes, before Peel and Sheila moved to Peel Acres, she mentioned a ritual with Peel on most weekends, where with John Walters and his wife Helen, they would take turns cooking dinner at each others homes, related in some way to a movie on television, which they would watch together on Saturday night: The reference to Where Angels Fear To Tread in the book was probably Sheila referring to the BBC play, that was broadcast on television in the 60's, rather than the 1991 film version, which she may have got mixed up with.