In the beginning of the last level ( the clouds burst )
Talk to one of the elves about 8 times and you will get a whole lot of whiet courage points.

Once you have found all the children and given all the food to the dwarf bombur. You may go back to the apple orchard. Look for a well that used to have a man standing next to it and go up to it. Hit "b" and and waters of vigour potion (used to make your life bubbles purple and prevent damage for a short time) will be acquired.