https://fromtheheartofeurope.eu/amy-dillwyn-jill-and-jill-and-jack/

Here Jill and her friend, Sir John Wroughton (an eligible young baronet), get together to rescue a friend who is being victimised by her guardians in house nearby both of theirs. There are frightful threats, intricate knowledge of local train timetables, and a daring rescue mission with one of the villains plunging to an awful doom. It’s non-stop melodrama and very entertaining if not quite up to the level of Jill on her own. Meanwhile Sir John’s mother, who starts by thinking of Jill as excellent daughter-in-law material, finds out what she got up to in the previous book and changes her mind; but it’s okay, as Sir John’s own views change in the opposite direction, and there is a happy ending all round. It would make a decent single episode of the Russell T. Davies mini-series, or maybe a two-parter. ( )