Turning spike
From Tardis Wiki, the free Doctor Who reference
A turning spike was a device used to draw water from a deep well.
Roman wells often used turning spikes. Horses attached to the spikes would walk in a circle, turning the spike and raising buckets of water from the well. At the Crediton Vale archaeological dig site, the Tenth Doctor identified a piece of wood as a Roman turning spike dating to around 70AD. (PROSE: I Am a Dalek)
