Same thought occured to me. You can see some to the far left of the second image (the one after the collage). Then if you skip to the final image and note the

Same thought occured to me. You can see some to the far left of the second image (the one after the collage). Then if you skip to the final image and note the shelf-unit (at the end of the long table) it snaps into focus - and you can just see the desks behind :)