Hi Scarecroe. The unknown gravedigger picture comes from the four-page "Jim Henson Show" brochure, and there was a discussion of it in the Jim Henson Hour Talk page. It appears to be from an unaired film of some kind. I thought I'd clean up some of these scans and put back portions of the image that were missing in some versions of the photos so that the images could be seen more clearly.
I have been restoring the Jim Henson Hour series from VHS and other sources (six episodes already out there in torrent land), and Boppity Frackle had asked for a DVD cover for the material released so far, so I recreated the logo and cleaned up some photos.