Slide 4 shows a file named slide5.jpg and carries the same back-and-forward pair, this time further left: Slide 3 at the edge of the picture and Slide 5 beside it. Its address number, 33, is higher than the next screen's, 32. The screens were evidently added out of sequence and simply linked in the right order afterwards, which is exactly the kind of rearranging the tool was meant to make painless.
The frame above is drawn at the original proportions. Each dashed box sits where the 2009 hotspot sat and links to the same screen it did then, so the tour can still be walked end to end.