Thad Box: As an old stone mason, I know something about walls

I was once a stone mason. I know something about walls.Some walls I built still stand in Texas, walls to keep floodwaters under control, fireplaces for heating houses, columns to support roofs, foundations for a public school. They exist because they have a useful purpose. Some rock structures were built to satisfy a property owner’s concept of beauty. One of many cut-stone fenceposts in a decorative fence around a mansion now supports a mailbox. Other things I built were torn away decades