@kjos send William to the basement then use the hammer on the nail of the painting near the office door.
@linda take the last 2 numbers of the years on the paintings (if I remember they should be 60 12 45).
The order: you have to follow the story in the Calmwood witch book.
1-the witch follows and rapes men.
2-the witch has children and they flee.
3-the sacred land discovered by the children.
I think I remember quite well, however if you the exact order is