“Remember us to everybody in Garland, particularly all the pretty girls!” shouted Hanky Panky, after the last exchange of handshakes, when with his two chums, Rod and Josh, he hurried down the gang-plank to the dock.

The steamer for London was leaving its Antwerp pier, and all seemed excitement. Many people were already fleeing madly from Belgium, now partly overrun by the vast invading army of the German Kaiser. At any day Antwerp was likely to be bombarded by the tremendous forty-two centimetre guns that had reduced the steel-domed forts at Liege and Namur, and allowed the conquering hosts entrance to Brussels.

While the trio on the dock continued to frantically return the salutes of their two chums as long as they could distinguish their figures on the hurricane deck of the staunch steamer bound down the Scheldt, a few brief explanations might not come in amiss. Possibly some of those who start to read this book may not have had the pleasure of meeting Rod and his four friends in previous volumes of this series.

The boys who wore the khaki lived in the enterprising town of Garland across the water in the States. How they came by the fine motorcycles they owned would be too long a story to narrate here, and those who are curious about the circumstances must be referred to earlier stories for the details.

They called their organization the Big Five because they planned to carry out numerous enterprises that might have daunted less courageous spirits. Rod Bradley was really the leader, though Elmer Overton, the Southern boy, often proved himself a good second.

Then there were Henry Jucklin, known to all his mates as “Hanky Panky” because of his skill as a magician; Josh Whitcomb, with a bit of the Yankee in his composition; and Christopher Boggs, otherwise “Rooster.”

They had covered many thousands of miles with those wonderful steel steeds, and met with some surprising adventures up to the time when an opportunity arose allowing them to go abroad. A wealthy old gentleman of their town, who knew their calibre well, had given them an important errand to carry out, and stood responsible for their expenses to the other side of the Atlantic.

Coming leisurely down the Rhine country they had been suddenly caught by the war tide; and as it was in Antwerp that Rod expected to meet the party he sought they had to strike out boldly for that far-distant city.

Strange happenings had marked their course through the war-stricken country of Belgium. Indeed, several times it looked very much as though they would never attain their goal, but might be sent back as prisoners of war to Germany.

Of course, their sympathies were mainly with the Allies, and particularly after they had seen with their own eyes how the poor Belgians, fighting heroically to defend their native land, were being cowed by the seemingly limitless legions of the Kaiser.