What was in the graffiti on Fringe last night?

Call me Fringe obsessed, but after commenter Schwack mentioned something about "Easter eggs" hidden in the graffiti on the wall during Charlie and Olivia's fight scene in last night's episode, I had to go back and take a look myself.
Specifically, Schwack wrote in the comments: "Some are saying there are some "easter eggs" in the mural/graffiti during Olivia and Charlie's fight scene. I went back to it and I did [see] the Fringe's seahorse, a portrait of Van Gogh and another man, though I don't recognize him.
I found the episode on SlashControl and took a few screen shots to see what I could see, enlarging and sharpening as much as I could without crashing our pages. Above is the main one and I must admit, I see nothing. The guy on the far end looks a little like Leonard Nimoy, but that would be too easy. More after the jump...
In the upper left-hand corner here, you can see the apple (I think), one of the symbols shown before going to commercial.

And in this one, you can see one of the other symbols, a butterfly (maybe), in the lower right-hand corner next to Charlie. What else do you guys see in these images? Now I'm wondering if they had someone actually paint the mural for the episode, but more likely, they found it while scouting locations and added in these little Fringe elements to make us get screen shots and examine them with a magnifying glass like the kooky Fringe nerds that we, uh, I ... am.


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