Material for stone walls comes from sifting rocky dirt through a couple of sizes of screen to get big and small rocks. Of course, I live in New Mexico, where dirt is easy to find; its not all covered over with vegetation the way it is in other parts of the country. The "big" stones are nearly the size of my figures' torsos; the small ones are the size of their heads. I build the walls with white glue to hold the stones together. As with the fences, I fasten them on cardboard bases with white glue. Again, there is no need to paint.

I can understand buying stone walls rather than making them since (a) there are fewer of them than there an fences in most scenarios (b) making them the way I do is time-consuming, almost an art and (c) we do need to keep hobby suppliers in business.

However, I still recommend gathering stones to build low walls that have a wooden rail on the top to raise the height. These are in evidence, for example, on Seminary Ridge at Gettysburg and in the area over which Pickett charged. There is an engraving on page 181 of Albert A. Nofi's The Gettysburg Campaign (3rd edition) showing a wall-fence.

To make such an obstacle, lay a rail along a low wall of stones, almost a long pile of rubble, really. Then cross two short poles over the top of the rail, and lay another rail on them. Glue the rails in place. That will slow down an enemy artillery battery for at least one turn!

Scratchbuilding Fences and Stone Walls

Materials
Worm Fences
Post and Rail Fences
Stone Walls