 In addition to the 48 outer window grids, there were also 48 grids facing inward, directly opposite the outer grids.They didn't reflect the light of the sun from any possible viewing angles on the street, but the artist worked with them as well, using morse code to embed messages in the window grids.The window grids were already in various stages of decomposition when Wulsin found the building, with almost a third of the total number of windows already broken out by inmates during various prison riots when the jail was still in use.