What about the portable towers that attackers moved into place against the castle walls to bridge the allure? Plutarch

Now this description is food for thought about how and of what such devices were wrought...

Light materials? Pine? And how high? At least it sounds as though the movers would have had some protection if they moved from within...

Hope to read more about this. It makes me think of Macbeth and that movable woods...

wwh: Fascinating reading about Humpty Dumpty the Dumped Hump of a Cannon...

Best regards,
Wumpty