I didn't remember the Cassandra drawing at all, but just as I was typing this, an image floated in to my mind and I think I did have the mag long ago that had it. I bought 16 religiously when the show was on because it had such good coverage. When AfterNoon TV started up towards the end of '68, it also had several fab features on the show. And it even covered my beloved STRANGE PARADISE in at least one issue.
Great detective work in tracking down the 1967 drawing, MB! I don't care for her portrait of Liz, but other than that, it's very good work.
G.