Tributes are starting to come in via social media and from around the world. You can read some of the comments on Walter’s pages on Facebook, of which he had two (as a result of not being able to keep track of logins and passwords towards the end of his life):
https://www.facebook.com/walter.satterthwait https://www.facebook.com/walter.satterthwait.9
And see what others are saying about him:
https://mysteryreadersinc.blogspot.com/2020/02/walter-satterthwait-rip.html
https://deaddeath.com/walter-satterthwait-death-walter-satterthwait-obituary-cause-of-death/
https://mbtb-books.blogspot.com/2020/02/message-into-ether.html
Walter Satterthwait 
I knew him in the way you didn’t and never had the fun you all did! Instead, I heard about it, and wished I were there.