Part of my story needs a horse-drawn farm cart to look as if* it’s lost a wheel in the middle of the road (it’s a cunning trick by 19th Century highway robbers wanting to stop a horse-drawn coach). *The wheel didn’t really fall off of its own accord, the robbers made it happen. I’ve Googled for info on this, and the results are unclear – what I need to know is, how were wheels attached to a fixed axle, back in pre-automobile days? If I go way back to medieval times, apparently it was a simple arrangement of the axle through a hole in the centre of the wheel and a pin through the end of the axle; however all the pictures I’ve found from the 19th Century show a covered hub in the centre of the wheel. What I need to know is, what was under that hub? Any Rip Van Winkles on site? Or collectors of old farm carts? Or even just a good mechanic?