I posted this before but in the wrong group. I am researching POW Codes for letters sent to MI9 by a pow in Auschwitz factory camp. I have copies of two letters and know what they are saying generally but I 'd like to break them down specifically. Used Langley and Foots' history of MI9 but the examples they give are not used by my man. He sent tons of letters to them and at the moment, it seems that only two have survived attached to his release Interrogation. Can any of you bods help please ? Many thanks .