LSSBB
Devilish Dictionarian
There was no variety in the east end of the 12th floor. The east end of the 12th floor was offices with dropped ceilings except for the large [conference?] room around columns 73 to 78.
I think you are looking at the office floor layout 180 degrees rotated from the column positioning. I am looking at pgimeno's picture post and column 79 is surrounded by offices, the large conference room is on the opposite side.
