A Powerbook box sits atop a barrel of sand in the Kalorama neighborhood. I have this thing with the boxes my computers come in and that thing is: I save them. I still have the original box from the computer I bought in 2002 because I still have the computer. This is dumb, I know, but I always have this idea that I'll pass my computers on to someone else—either by sale or gift—and that they'll want the box. Nevermind that that computer from 2002 doesn't really work anymore; I still have both the computer and the box.
So what's the story with this box? I envision someone picking up a Powerbook at the Apple store. Then perhaps they got on the train and took the computer and whatever else they wanted to save out of the box. Then they were walking home with their new computer and just had too much to carry so they ditched the box.
Who knows?