In confirmation of my telephone message, I have been personally directed by the Prime Minister to inform you that he wishes you to send him daily all the ENIGMA messages.
These are to be sent in a locked box with a clear notice stuck to it "THIS BOX IS ONLY TO BE OPENED BY THE PRIME MINISTER IN PERSON".
After seeing the messages he will return them to you.
P.S. As there will be no check possible here, would you please institute a check on receipt of returned documents to see that you have got them all back.