Dennis Tallett sent along the following item of interest:

"I thought you might like a copy of this for the Spenser archives. It appeared in The Godwulf Manuscript - The Journal of The Judas Goats, an association of Parker/Spenser Devotees. Fall/Winter 1988. Vol II, No.3."

It was also printed in a limited edition of 100 signed and numbered copies by St. Johns Press.  Spenser's Mystery Bookstore has one of the originals framed on their wall.