Above are a number of images from when the Library first opened and one from later on its history. These images are owned by the Brisbane City Council and used with permission.
In order to find the location of this cache, you will need to visit the old Library. When you arrive you will need use the answers you find to get the final coordinates.
Day of month opened: AA
Year Opened: BBBB
Number of letters in the last name of the lord mayor: CC
DDD = BBBB - 1,045
EE = 67 + CC
Location of container: S 27 2A.AEE E 153 03.DDD