faded number on the top left is a '20'. The faded number on the top right is a '15'. The thing that looks like a B in the top right sqaure is in fact a 13.
Oh boy, explanation time. Pretend each square is a cube, stick 'U' on top of 'C' and 'L' under 'C' and you have the unfolded model of a tesseract/hypercube....and this space in COW I assume. This map has a few things that should be clarified. It is actually drawn sideways, the right side is north, the current up is actually west. All the numbers scribbled everywhere are door numbers. Each square has a door on each of its sides. 1 and 1 are linked as are 22 and 22. The numbers in the middle of the squares are doors that go up/down. They are put in the form of a fration, the denominator going down and the numerator going up. Room L only goes up just as Room U only goes down. Room F is an odd exception in that nothing is necessarily above/below it....yet everything is. This is how my mind interpreted the 4th dimensional aspect: by somehow folding up all the rooms but F, and then turning F inside out and wrapping it around the sides of the other Rooms. Don't ask me how this works, I understand it, but I can't really explain it.
Further questions/concerns will be added as they come up.
I also felt I should include this moving model of a tesseract/hypercube for no real reason.