What is probably Wrightson's first portfolio/print illustration outside of comics. Wrightson's page, along with other contributing artists, for the "Abyss portfolio" out in 1970. That helped finance the ABYSS 1 fanzine (Nov 1970) that Wrightson also contributed a story to.
I have an oversize print of this, from 10 or 20 years after the fact.
Here's a checklist of Wrightson's harder to find fanzine work, much harder to find, or even know exists, than his mainstream work. Many are just a cover, pin-up page or convention sketch. http://www.glimmergraphicsprints.com/BWFanzines.html
