It's too bad ROBERT E. HOWARD'S SAVAGE SWORD seems to be on an indefinite hiatus. That would have been a perfect venue for spotlighting some of his lesser known characters and stories. I enjoyed reading the ones they did adapt, but would certainly welcome more. "The Cairn on the Headland" being one I'd love to see.
But here's an adaptation of "The Thing on the Roof" by Roy Thomas and Frank Brunner, from Marvel's Chamber of Chills #3 back in 1972.