As the end of 1928 neared, war was already raging in Europe. England and Russia had already gone to war as Robert had predicted. Complications were developing quick and fast and war clouds were gathering. Robert knew that it was only a question of a short time when the United States with all of its gold supply, would be attacked and there would be a great battle in the air. Great progress had been made in aviation. Airplanes were carrying mail at the rate of 300 miles per hour. Passenger lines were now starting all over the United States. "Marie the Angel of Mercy," Robert's great ship, was rapidly nearing completion. The new 12-cylinder motor had been tested and the engineers had estimated that they would attain a speed of 1000 miles per hour. Robert was elated over the success and knew that he would now be prepared to help his country in time of its greatest need. He had been working early and late and the interest in his work had kept his mind off Marie. Yet not a day passed but what he made some inquiries or had his detectives chase some clew which he hoped would lead to the discovery of Marie, but all efforts were in vain. No news had ever been heard of her. With the great progress in radio messages thru the air, and radiograms, Robert knew that in time of war, secret communications would be necessary. Spies could steal codes, and messages sent over the radio could be interpreted; therefore, one of the great needs for the war in the air would be a way to communicate without detection. He finally succeeded in completing what he called "The Pocket Radio." It was no larger than a watch and worked on the same principle of his machine for recording the thoughts of people, only the instrument had to be used by two people who understood how to work it, because the positive radio was carried in one man's pocket and the negative in the other and by pressing the stem, it could be changed from positive into negative. No sound was transmitted thru the air. The machine could be operated by certain motions of the fingers on a little push button which recorded symbols on the other machine that would reveal the message sent. The Pocket Radio made it possible to convey any message without any possibility of detection because only the person sending the message and the one receiving it could understand or know anything about it. This was better than wireless or any other radio discovery up to this time. Robert tested the machine out by leaving one instrument in Walter's pocket, he himself going to Chicago and conveying messages which Walter was able to get without any trouble. He could either speak into this little Pocket Radio and convey the sound without anyone else being able to take it from the air, or use it to convey thoughts or emotions. The test proved perfect and Robert knew that he had another great discovery which would be of great value to his Government in time of war. He decided to keep this a secret and have it ready to aid the