Ancient drawbridge

I have a scholar outside this and she has researched and I have to find the missing stones but she will not move away from here. Where are these stones please.

Also there is a scroll (I think) on top of a hillock in the west, how do I get this, I have planed a beanstalk but that can't be right.

Thanks V much

One stone is above the small pond front left of castle. One is on hill to left of drawbridge area.One is down by the stream that runs east-west below area where tavern was built ( below the two tree stumps ). They are white with green spots and there is a quest in each kingdom that requires finding some.
Sorry I forgot to answer on the hillock: Archers need to shoot the large plant blocking the way up to it ( there are 2 vines the can be chopped and 2 regular stone bricks ), someone must mine the stone on top and a chest will appear just in front of where the knowledge tome is once the tome is picked up.

Thank you, I've got 2 just need another.