Today, going through my copies from my research in the Stasi Archives in Berlin, I noticed that a small red strip of paper was stuck between the copies. Somehow, the small strip must have found its way from the original files to my copies. Only the archivists in the archives are permitted to take copies for researchers, so it is not my misdoing. I can’t help but feel a bit eery anyway. The text on the strip: “HENNING MITTENDORF POSTFACH 50 11 37 D – 6000 FRANKFURTH /M. 50”. The strip was from Robert Rehfeldt’s file, and the name on the strip – Henning Mittendorf – is also in Mogens Otto Nielsen’s mail art archive.