I didn't realize that yesterday was the birthday of Edgar Allan Poe, and the date that an anonymous person used to visit this marker and leave roses and cognac. But now they say he hasn't shown up for three years and the tradition may be over. I visited the site last year when I was in DC for the Cherry Blossom Festival, it's a cool little graveyard, some of which is actually underneath a church. Note that Poe isn't actually buried there, but used to be. I seem to remember he was originally buried in an unmarked grave, but I guess they figured out it was him later on. I'm a little fuzzy on the details, I'm afraid.