There is an unfamiliar man with a thick grey beard and coon-skin hat (complete with tail) pushing an ancient vacuum cleaner through the library. Your choices are a) really confused new custodian, b) halloween costume, or c) crazy person.
All of the above? - Johnny
d) Larry. - Andy
oooh, good suggestions - lris
Turned out to be n) person who either knows facilities employees or works for facilities. This does not preclude options b) or c). - lris