This video is from the Creative Mornings talk given by Charles Morrison, a professor and avid letter writer. He writes four letters each day, using a dip pen and ink, on topics he's collected for letter-writing. He's got whole files dedicated to things to write about and also consults dictionaries for other prompts. He wasn't always a letter writer; he started in 2001 as a way to connect with a dying relative. His letters were emails then, but he evolved his process after his sister passed away into actual letters.
In the article written by Mónica Guzmán for the Seattle Times, she mentions that "Morrison hopes for a handwritten letter every time he checks his mailbox — who doesn’t, even today? — but he has just one correspondent, one person of the more than 100 he writes to who regularly writes him back." Yet he keeps writing on and people keep asking him for letters. I am inspired and I hope he continues to "explore his curiousity" through letters. I was unable to locate an address for him, but I'll bet if you wanted to, you could write to him care of Cornish University where he is an adjunct professor.