One more post, on one broken leg.

[SSlater]

I do not see a need to determine "when". Booth broke his leg, and I do not criticize others who wish to know. My thoughts go this was:
Booth jumped to the stage. He may or may not have broken his leg. (No examination was made.) If he damaged the leg in any way, his heavy boot kept the leg functioning, as if it already had a splint. Then, somewhere en-route to the Surratt Tavern, his horse stumbles and falls and aggravates the sore leg. Lets say that they take the boot off - Bingo, a broken leg. Herald was not aware of the previous jump, so he rightly assumes that the horse broke the leg. They put the boot back on and the hills still ring from the profanity that was generated by the boot being put on. Off they go......
This is no more fiction in this depiction, than in all the guesses that have gone before. However, this suggestion allows each camp to be correct and it is very possible to have gone down as described. I can't prove you to be right, nor can you prove this to be wrong.