It is to be found as a sub-menu under the main Graffiti tab in Photo Galleries.
Another advantage of having done this is that the images are clickable to get an enlarged version, and some of the work really is good.
By the way I was so worked up about the subject matter that I posted everything without a reference number. Sooo, if anyone is interested in a particular image or would like a soft copy mark up a screen print, or similar way of ID, and I'll mail it/them. Too idle to go back and do the necessary.