I am deadly serious. Corbett vastly surpassed Tua's accomplishments relative to his era. He was the undisputed champion. Even if Sullivan was not the best heavyweight in the world at the time, Corbett had drawn with the only other serious contender honor in Peter Jackson. You could argue that Tua fought in a better era, but I don't see how there would even be any debate regarding who accomplished more!
The surviving evidence? If the only evidence that you have looked at is a couple of still photographs, then you are merely showing your lack of knowledge regarding the available evidence. How could you possibly interpret how a fighter fought from a still photograph, when you don't know what he or his opponent was doing, either before or after the photograph was taken? In any event the Sullivan Killrain fight was fought under bare knuckle rules, which involved a completely different stance to a gloved fight, because wrestling throws were allowed. I can assure you that some manuals from Corbett's time are virtually indistinguishable from modern ones, in fact some are still used today for goodness sake!
This is a bit like the Soviet political system trying to discredit their political dissidents, by saying that they were mad. Somebody disagrees with you, therefore they can't be serious!
Perhaps people spend too much time looking at the footage with Tua! I am convinced that some people watch highlight reels of him knocking out tomato cans and fringe contenders, and then imagine the faces of the all time greats on them!
Off the top of my head: Art of Boxing and Manual of Training, by William Edwards 1888, is still in print. Books by Jim Corbett, Jem Driscoll, and Tommy Burns are I think also still printed.
And you believe that the boxing techniques in William Edwards's book are the same as the ones modern boxers use? Careful, Janitor. The book is freely available online. The same "book by Jim Corbett" that the Thong Squad frantically disavowed as soon as I posted what it actually said? I'll get to these soon enough.
As are many modern manuals, ghost written by Joe Frazier and others. Old boxing manuals are a bit like old encyclopedias. They just don't seem to go away!
My question was whether you believe that the boxing techniques in William Edwards's book are modern. Yes, or no?
By all means read it and give me your opinion. I doubt that it has survived as a historical curiosity, based on the name of the autour.
I don't have this book, but from what I have seen of manuals written around that time, the basics have not changed much. The only obvious thing, is that the position of the guard has changed.