In an earlier post (https://natchard.com/2011/10/02/peepshow-ladders/) I showed a proposal for some ladders to site a peepshow at a high horizon so that it could incorporate the rest of the items in the room as part of the content of the peepshow. The pictures in that post were of the Mk. 1 ladder, a sketch model. The subsequent two versions developed the ladder design so that it could be cut out of standard sheet sizes economically and have a little more stability and stiffness. Here are the three main versions.