The Three Years of the Tower of Art archive sheet revealed two more sports that made it to the design stage, but so far no single examples of these stamps have cropped up perforated or unperforated as postal decorations or by any other means. One has the E of the ONE at the top of the stamp reversed, while the other has double the number of windows up the tower. Neither would have presented collectors with a problem of identification (as would the Open Door sports), so perhaps these were only shelved because the concept had been overdone and sufficient sports had already been released. It is just possible that one of other of these does sit unrecognized in a collection having been used as postal decoration by Colin.