
The last picture shows an interesting piece of joinery. Two pieces were joined together. The small rectangular block in the middle is the key. After the two pieces are fitted together, the key is driven in and the two pieces are locked together. I couldn't get a picture of the whole joint because the bottom is underground. Note that the top of the joint is cut on a "V" from side to side so that the joint can't slip sideways.
Anyway, I thought it was kinda cool.
Pete
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