Just got back from a museum visit today where had the opportunity to view bunch of prints made by him, (not his sons)

According to the catalog published by the museum the prints were made by him between 1937 and 1944.

It had been a while since I saw EW prints up close and in person, but what I noticed most of all was the amazing shadow detail but still showing contrast and rich blacks.

The prints seemed to have a cool, very slight bluish or even purple tint, that I have only seen when gold toning. Was this just the paper he was using and the color he got from amidol?
Did he use selenium toner? Or gold? Can someone confirm if prints made during that time period were on Azo or something else?

It was a humbling experience that took down my confidence several notches that I know how to make good prints or operate a view camera.