In the Money

This is an uneasy mixture of adventure and timeslip. Two children move to a vast, expensive house in the country. Suddenly money is pouring in, but from where? Why does Dad have secret meetings and mysterious packages delivered to the house? As Paul is exploring the numerous rooms and corridors, he finds a small girl in one of the passages. She's dirty, hungry and frightened. She knows everything about the big house and its housekeeper, only she died 100 years ago ... her link with the present as well as the past is a warning. I found the ending unsatisfactory -Dad and his shady dealings vanish, the money vanishes too, and the children and their mother return to a more frugal lifestyle. Has Dad got away with his cash? I would have liked to know.