Have you read Mencken’s review of Fitzgerald’s Gatsby? I wrote a blog post about Mencken earlier this year and linked to it: https://www.chicagotribune.com/lifestyles/books/ct-prj-great-gatsby-f-scott-fitzgerald-hl-mencken-20141010-story.html
If interested, here is my post about Mencken himself: https://pioneerproductions.blogspot.com/2018/06/the-scathing-pen-of-that-ol-curmudgeon.html
I enjoy reading your snapshots because they trigger all these other connections. Interesting that the photo of Scott that you used is the same one Mencken used.