I'm guessing it's something similar to a Polybius square [http://en.wikipedia.org/wiki/Polybius_square]. There's enough Qxn symbols such that Q<n could be an x-coordinate and Q>n could be a y-coordinate - so Q2 is (4,2). Additionally, Qn which supports that they may be a pair of coordinates. Where there's not pair, it could be something like the missing coordinate is the same as the coordinate from the previous pair. However if that's the case there would be a couple of redundant symbols - like in(Q2+Q<3Q>2)so maybe there's something else going on. Not sure about the +'s either.
Anyway I'm supposed to be doing Uni work so I can't really take a close look.
Anyway I'm supposed to be doing Uni work so I can't really take a close look.