Since May 1944, we noticed that the warning signals are usually sent captives to each other, fed more gestures than voice. So far we have not figured out what it was, it seemed rather odd. We noticed that as soon as we enter the courtyard, in one of the windows of the eastern block, which is located directly in front of the gate, there were square pieces of cardboard, painted either diagonally or crosswise. We thought that these signals are designated, who is entered into the court. Maybe it was misguided Goon, maybe the police squad, maybe just me. However, those cartons could well indicate the direction in which we move. We were able to pick the right and pass by senior officers of the unit to the kitchen; we can choose a more dangerous path and go left past the cameras to the stairs at the tower on the north-west corner. Most likely, we decided, no one would be so warned secretly worked in a place from where they were not directly visible to the gate on the western side of the courtyard, where there was a gap in the buildings. In order to solve this riddle, we needed a couple of weeks.