I recently spent three weeks in Port Hope working as a substitute stone gopher of sorts for a drystone walling outfit. It was an incredibly formative experience, and not just for the chunks of limestone I shredded into scalloped flakes for much of the time. I feel like a gleaned a basic appreciation for what goes into building without mortar and for the intuitive element of the craft that can't possibly be set down in a manual.
Below are some photos of the wall we built near Uxbridge, ON. It was quite something to finally step back after the five or so days and admire the beautiful thing we had created. To look at it is a bit like staring at one of those magic eye puzzles; you know that it was just now raised from a pile of stones, but your eyes insist that it is ancient, timeless even.