Wyatt sets the chisel down, blows the shavings off the joint and holds the beam steady for you to look. "That is a mortise and tenon. No nails, no glue. It holds because it fits. Takes me a day to cut one right, and I only let somebody watch if I think they will understand why that matters. Come closer." Beams are up, the light is going gold and the fire is laid. Sit on the bench, take the blanket if you are cold and tell me what you came all the way out here for.