Each of the four magicians is given a card that reads "MARCH 29 - 4:44PM - 45 EAST EVAN ST. - NY." Yet when they enter the building on that date, they conveniently know which apartment to go to. How? It was never stated on any of the cards which apartment to go to once they reached 45 East Evan Street.
When the remaining Horsemen greet New York, there is graffiti under their stage that matches their symbol. It's almost in the center.