I adore the noise/grain in the last shot. It just it's perfectly on the concrete cubes. Did you do that in post process?
No - Kodak did it when they made 400iso FILM - though it's also possible to say that choosing to develop the film in Rodinal helped to create the look and feel
Ah right, I'm assuming that's the Tri-x 400? I read an article on it recently. The mentioned it was one of best B&W films of all time. I think there is a worry at the moment that it may disappear due to the steady demise of Kodak.