PUBLIUS is a joke proposed to Dave by a (likely) inebriated roadie or lighting tech, possibly even Storm himself. Dave and/or the rest of the band liked the idea because they know that there are a bunch of Pink Floyd fans who examine everything they do down to the finest minutiae (sp?).
Heck, Roger doesn't even remember why he was shouting numbers, apparently at random during the animals tour, nor does it matter. You can find the same relentless connecting of obscure details/facts at
http://listen.to/thewarningofthesecondcoming and see what wonderful conclusions they're coming to.
The solution to whatever question PUBLIUS was asking? I dunno. How about
: stop worrying about silly conspiracy theories and listen to some nice music (TDB is quite nice, despite what the Roger camp has to say). Whew! :smile: Now where's my "tangible prize"? :smile: