Mrs Hargreaves (Hallowe'en Party)

In the novel Hallowe'en Party, Mrs Hargreaves is the wife of the organist in Woodleigh Common. While preparing for the “eleven plus party” at Apple Trees she brought a large green plastic pail, to use for the apple bobbing. Miss Lee thought that a heavier galvanised bucket would be better, since it wouldn’t tip over so easily.

Naming
In the novel the organist's sister is mentioned as being Miss Johnson. It is strange that the unmarried sister of the organist doesn’t have the same surname as his wife.