For anyone who likes to waste their time on pointless puzzles here’s one, and it’s even more pointless than most because I can’t supply the solution. If you can you’ll be saving me from even more grief.

In my sorting through old papers I came across a single typed sheet headed NON ALIAS PLOT with a list of various names which I soon realized were all anagrams of each other. The typing was done on what looks like my old Olivetti portable and the paper size is quarto, not A4, which would seem to date it back to the early 1970s. But what does it mean, what on earth was I thinking? Above all, what are all these names anagrams of?
At that time I was doing illustrations and writing various things for some of the more adventurous (meaning small-time and unsuccessful) periodicals of the day, and it looks as though this might have been an attempt at some sort of avante-garde piece. Perhaps these characters were to feature in a story or playlet; I can imagine Pat Lion Sloan as the very posh p.a. to a top executive and maybe Alan Tinspool as a rather self-important manager in the grocery business, but after them things take a more bizarre turn. Lon (‘Piano’) Salt is obviously an itinerant boogie-woogie piano player, perhaps in a vague partnership with Pliant Alonso the eccentric dancer, while Spain O’Tallon, Nina Last Loop and Lopo Slantani seem to be denizens of the US underworld, but I can offer no clues about Polliana Sot or Alan T. Loopins. Maybe the denouement of my little tale was to have been that all these characters were actually the same person. I was always trying to be clever in those days, with little success then and not much more now. J.G. Ballard I was not.
I’ve spent more time puzzling over this than I want to admit. The letters in these names obviously came from something, some key name or title or phrase — I wouldn’t have just chosen them randomly — but searching what’s left of my brain produces absolutely no memory of it. I’ve also tried feeding the letters into various online Anagram Solvers but the solution remains a mystery, although they did come up with a few amusing variations: the onanist Pallo making a mess on the post-anal lino and getting a notional slap from his indulgent mum. I feel that the answer is staring me in the face, that with a bit more effort it will reveal itself, and when it does I’ll cry out “Of course! Why didn’t I see it?”
But so far it hasn’t. If one of my devoted readers can figure it out please post the answer in the Comments and put me out of my anguish.