Which he very definitely was, as were the "roommates" who appeared in family photos off and on over many decades. But that never appears in his biographies.

I am glad that you did know people who could tell you.

(Who was your great-great-uncle Arthur that he had biographies?)

There were, and are, a lot of people who don't say a lot of things.

I really appreciated that the film made room for their absence. It reminds the viewer of all the other people who didn't go into the archives, which doesn't mean they weren't real.