It is important to remember that the primary function of 3-US is to select military and air items from CX/MSS for transmittal to Washington. Little or no guidance in what to select is given by Washington, which wants to receive “all desired intelligence.” The principles of selection are never formalized or reduced to paper. From the outset a green staff at 3-US selects material for a green staff in Washington. That it all succeeds is thanks to “the unbelievable patience and interest and wisdom of key [British] people in Hut [3].”
