In my mind's eye, I see a primitive boat builder doing something similar. He has no steel clamps. So, he uses cordage (roots of spruce and/or willow that have been soaked, and then twisted together for strength.). Tension is built into the cordage by twistng with a stick, in the manner of a tourniquet, sometimes called a Spanish windlass.
The primitive boat builder raises his head. Looking around him, he squints, and peers forward into his future - and our present. Smiling, he waves. Speaking words that he doesn't understand, but somehow knows that one is listening who will know what is being communicated. "Nice work, JD."