I personally think the bishop was already kind of senile in his later years. After 40 years of fighting modernists, that's understandable, but nevertheless bad for the faithful.
I don't agree with this " senile" term. It was remarkable that, to the very end, you could watch his sermon videos, for Sundays esp...he would hold on to this very small missal, all tattered and ancient, yet his mind was admirably smart, and explained mysteries as much as is humanly possible. So, yes, sometimes he would forget a detail here and there, but his love of Catholic culture invariably trumped any memory lapse. Actually, the last three sermons, they were perfect. The Epiphany if I recall was special. But yes, he wouldn't talk for an hour. "His Excellency" is what it says: Bishop Williamson was E X C E L L EN T !
He was very hospitable to me in Winona. He actually composed a little 4 line poem for me. Let's just finish by saying he was dignified, had integrity as Fr Chazal just spoke.... Once in a while he would use the French expression: " Noblesse oblige" which roughly translates to: When you hold a higher public office, walk the walk and talk the talk.
Pray for he repose of his soul,... RIP +