OK - I've used the walkthrough, tried my best to get through the
teleporting squares "puzzle?" in the s.e. quadrant of the sewer -
i've followed the suggestion in the walkthrough but nothing has
worked. The only thing I can see even slightly odd is that the
button in the first hall never seems to LOOK "pressed" (like the one
elsewhere). It simply turns me to the left.
Can anyone help me get unstuck in this endless sequence of getting
nowhere?

Also - I read here earlier that I will need the strongman at some
point but have been told "he wasn't there that weekend" for THREE
weeks in a row. Can anyone tell me what's up with that? No way to I
have anyone close to Strength 40 which I'm told will be needed later
in this sewer.