But their surfaces bear witness to homely labor: Topping the tallest stone, once part of a trilithon, is a tenon—half of a mortise-and-tenon joint borrowed from woodworking.

但巨石的表面见证了平凡的劳动：曾是三石的那块巨石有一个凸榫——是从木材加工借鉴而来的半个榫臼接头。