By far the greater portion of the enormous amount of cable correspondence handled by this office has been in the form of code messages. Since the necessity for security has required that the code words of each message be enciphered to prevent the possibility of the message being intercepted and read by the enemy, it has been necessary to subject each code message to two complete translations. It has also been the duty of this section, in order to insure secrecy and to secure economy in the transmission of messages, to prepare five code-books for publication. Few persons realize, I imagine, that the use of code by the Military Intelligence Division, the Adjutant-General’s Office, and other branches of the War Department, as well as by the American Expeditionary Forces, has resulted in a saving to the government of at least 50 per cent in the cost of telegraphic and cable communications. The use of the Geographical Code has brought about an even greater economy by eliminating the necessity of spelling out foreign place names. Though hundreds of plays, novels, and magazine stories have been based on the work of code and cipher experts in this and other countries, the writers have usually painted in too vivid colors the romantic side of the calling. Though code and cipher work is frequently productive of exciting and dramatic moments, it is usually the intellectual excitement of a chemist who, after weeks of laborious experiments, discovers a new reaction, rather than the physical thrill which a detective experiences when he discovers a clew to a crime. * * * * * Because of the enormous number of foreign-born citizens who were brought into the army by the draft, or who entered it through the National Guard or as volunteers, the work of counter-espionage within the military establishment itself was of vital importance, for a single traitor in the expeditionary forces might well have turned victory into disaster. Had it not been for the vigilance and efficiency of the Third Section of Military Intelligence, which was charged with counter-espionage within the military establishment itself, our hastily recruited and somewhat loosely organized armies would have afforded countless opportunities for the operations of enemy agents. I can give no higher praise to the work of this section than to say that, though numerous enemy agents succeeded in gaining admission to the military service in the United States, they did not succeed in getting overseas, where they might have done irreparable harm. So active were our intelligence officers, so carefully did they investigate the record of every man destined for service in France, that, of the two and a half million men in the A. E. F., not a single one, so far as I am aware, was convicted of espionage.