"Due east," replied Chester, "but first rise as high as you can." Hal obeyed this command, and soon the two boys and a dog were thousands of feet above the earth. "What's your altitude?" called Chester. Hal told him. "Good!" said Chester. "Keep her there, and now head due east." Quickly Hal brought the big aircraft about, and pointed her nose in a direction that eventually, barring accidents and the misfortunes of war, would land them in the heart of Poland, where the mighty armies of Russia were rushing upon the German legions. "I know we shall get through safely," called Chester, as they sped along. "Some way I feel it." "And so do I," Hal called back. They were right, and before another night had fallen these two young American boys placed in the hands of the Grand Duke Nicholas, commander-in-chief of the mighty hordes of the Czar, the paper which had so strangely fallen into their hands--the paper which, later on, brought about more than one serious check to German arms. But here ends the story of the Boy Allies along the Marne. Their further adventures will be told in a succeeding volume, entitled, "The Boy Allies With the Cossacks; or a Wild Dash Over the Carpathian Mountains." TRANSCRIBER'S NOTE: Minor changes have been made to correct typesetters' errors; otherwise every effort has been made to remain true to the author's words and intent. End of the Project Gutenberg EBook of The Boy Allies On the Firing Line, by Clair W. Hayes