You could well be right, though, because, apart from this out-of-print book, the level of (net) published comment since 1859 seems to consist of variants on "s'obvious, innit?"

And if you are, that would make this an interesting example of how good stories win out over boring facts.

And...cough...I might also...possibly...have emailed the cathedral architect to ask whether he thinks it's structural or not.

I wonder if he'll reply?  :)