What Does This Mean? (Plus An Update)

First, the update:

As you can see, this box that I wrote about finally has its door, or lid, or whatever, back in place. I'm not sure exactly when it was done. I noticed it on Thursday. Not sure who did it, but there it is, with some sort of band holding the cover in place. I think that's because it got dented while it was lying on the ground, most likely from being stepped on a time or twelve.

Now then, here's a photo I took last week. This has been on the wall at the 15th Street station on the El for as long as I can remember. Someone wrote a message on it, and for the life of me I have no idea what it means. It's not just regular graffiti. There seems to be a message, but I can't figure it out...

Click on the photo for the large version and tell me what you think the writer is trying to say. The only part I really understand it that it was someone's mother's 116th birthday. Is it possibly some form of street art?