You wrote, "You trust in thiers, I trust in Vionnet, . . ."
I don't trust anyone. Thiers work appears to be a good data point. I like the way he takes on historical revisionists.
Was Major Vionnet personally present at N.'s headquarters working alongside N. and B. during Leipzig? In not, it's some form of hearsay. Memoirs are great but when the author goes outside of where they were personally present it devolves into just another opinion.
We have all of these N. experts here, what did N. say on this subject? If he was mum, then he never gave the order to B. If he had given the order and B. didn't execute it, then that really would have been something to point out concerning such a significant defeat and the botched retreat.