Or, why I never got that box/letter/postcard you sent: an essay in three pictures.
This is actually how post gets delivered to a majority of the students living on campus. Hell if I know how it works. But every Monday, a dude will unload his motorbike full of boxes at the corner of the ping pong tables and hang around. Sometimes there's someone to keep an eye on things, but mostly the boxes are left there for anyone to paw through them.