I married into a Cornwall family of William Henry Williamses (most common name) and pasties were the coal and copper miners meals in the mines. They were half a large dinner plate size folded over in half. The miners kept them in their shirt fronts while they worked keeping both pasty and man warm in the damp cold under ground. Our family recipes use chopped or ground suet for shortening in the crust which makes an extra richly flavored crust. Butchers used to grind the suet for but now you need your own grinder. I never could chop it finely like my mother-in-law.