[OT] Multi-shot flintlocks in the 1820s?

If anyone had told me an hour ago that various designs for multi-shot flintlocks existed anywhere in the world as early as the 1820s - and even earlier - I would have questioned their sanity. I'm far from being a gun expert but I thought the first repeating pistols only originated about the time of the (US) Civil War and the first repeating rifles soon followed. How wrong I was!
Ian McCullough (or McCullum, I can never make out exactly what he's saying) tells us about the Jennings 5-shot flintlock in this video and mentions an even earlier design that was effectively a semi-automatic rifle dating back a few days earlier):
https://www.youtube.com/watch?v=shDQOi6YDo8 [10 minutes]
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Rhino