I came across it on Lovecraft Ezine Podcast profile on Facebook today, and as probably not everyone has an account there, I decided to share it here too:
"A postcard from Thomas Ligotti to my friend Joe Pulver. I rediscovered this tucked away in one of my folders."
This kind of material deserves to be preserved. I have a great deal of respect for Joseph Pulver, especially for his appreciation of Chambers. Thanks for sharing it.