Found them all. To get on the roofs of the town start at coordinates 1425, 1547, jump on top of the shovel then onto the nearest roof and then make your way across via the other roofs to the scrying orb.
I'm lazy, I hold the body of the mouse with my right hand and hit the left mouse key very quickly with two fingers on my left hand. "Give the hardest job to the laziest man and he will find the easiest way of doing it"