At the very outset she was baffled by Miss Jones.

She had always despised Miss Jones as a poor unfortunate female who was forced to teach children in her old age because she must earn her living--a stupid, sentimental, cowed, old woman at whom the children laughed.

She found now that the children instead of laughing at her laughed with her, formed a phalanx of protection around her and refused to be disobedient.

Miss Jones herself was discovered to have a dry, rather caustic, sense of humour that Aunt Amy felt to be impertinence, but could not penetrate.
"And is that really how you teach them history, Miss Jones?
Not quite the simplest way, surely...

I remember an excellent governess whom we once had--" "Perhaps," said Miss Jones, gently, "you would give them a history lesson yourself, Miss Trefusis.