we can infer a little bit more than that. The framing of the two photographs is exactly the same (look at the two rocks in the lower right hand corner), and so that camera was almost certainly not moved between the frames. That seems pretty improbable to me if the cannonballs were actually delivered by cannons.
I suppose that is possible. But then I'd expect to see canon balls somewhere like by the side of the road. Why take the trouble to move them all entirely out of frame?
