My rock stockpile _ I fetch the rocks from a hill on a farm about 5km away - vehicle access is limited so it means a lot of hard work lugging them to the pickup - I usually go rock-gathering in winter when the grass is short and I don't have to worry so much about snakes and spiders.
The new house is being build around the old farmhouse while I'm still living in it - first a freestanding roof was erected over the old house and now I'm building new walls around the old house, breaking down the inner walls as I go - in this pic you can see the old house (green) inside the new outer window.
Each rock has to be balanced with wedges, then tacked to keep it steady before removing the wedges and doing the final grouting - it's a very slow process ...
I use blocks of wood which I can move up and down the upright beams to keep my wall line ...
A plumb line is used to ensure that each rock is on line. It's a little more complicated in rooms where I've built the inner-wall with rock too.
You can see more pics of my stoned house here