Flinders wrote: [
You were dead right. Horses can reverse 'under orders' with a rider on board, but only slowly and one step at a time. And it requires a bit of training, surprisingly enough. (It's called 'rein-back').
If a horse is going backwards at any speed, that's going to be the horse's decision not the rider's, and something is very wrong. You were very right to be cautious!
Thanks for the additional insight into the technicalities of this. Interesting.