So - if this was first, why didn't we run it before the earlier tale from Go-Go Comics?
Because that's the way life worked. We'll let the editors explain:
So, as you see, he may have done this first, but it was not the first to appear. It seemed right to follow suit. Now we're here and you can enjoy Grass Green's first professional sale:
If you're wondering - yes, we will be going back to Green's underground comix, as well as some more mainstream surprises (probably) along the way.
The Shape by Grass Green (and Mac & friends) for Charlton Premiere #1 (1967)