Espionage is that kind of warfare of which, even when it succeeds, no country boasts. It is military service an officer may not refuse, but which few seek. Its reward is prompt promotion, and its punishment, in war time, is swift and without honor. This story is intended to show how an army in the field must be on its guard against even a supposed spy and how it treats him.

The war offices of France and Russia would not permit an American correspondent to accompany their armies; the English granted that privilege to but one correspondent, and that gentleman already had been chosen. So I was without credentials. To oblige Mr. Brand Whitlock, our minister to Belgium, the government there was willing to give me credentials, but on the day I was to receive them the government moved to Antwerp. Then the Germans entered Brussels, and, as no one could foresee that Belgium would heroically continue fighting, on the chance the Germans would besiege Paris, I planned to go to that city. To be bombarded you do not need credentials.

For three days a steel-gray column of Germans had been sweeping through Brussels, and to meet them, from the direction of Vincennes and Lille, the English and French had crossed the border. It was falsely reported that already the English had reached Hal, a town only eleven miles from Brussels, that the night before there had been a fight at Hal, and that close behind the English were the French.

With Gerald Morgan, of the London Daily Telegraph, with whom I had been in other wars, I planned to drive to Hal and from there on foot continue, if possible, into the arms of the French or English. We both were without credentials, but, once with the Allies, we believed we would not need them. It was the Germans we doubted. To satisfy them we had only a passport and a laissez-passer issued by General von Jarotsky, the new German military governor of Brussels, and his chief of staff, Lieutenant Geyer. Mine stated that I represented the Wheeler Syndicate of American newspapers, the London Daily Chronicle, and Scribner's Magazine, and that I could pass German military lines in Brussels and her environs. Morgan had a pass of the same sort. The question to be determined was: What were "environs" and how far do they extend? How far in safety would the word carry us forward?

On August 23 we set forth from Brussels in a taxicab to find out. At Hal, where we intended to abandon the cab and continue on foot, we found out. We were arrested by a smart and most intelligent-looking officer, who rode up to the side of the taxi and pointed an automatic at us. We were innocently seated in a public cab, in a street crowded with civilians and the passing column of soldiers, and why any one should think he needed a gun only the German mind can explain. Later, I found that all German officers introduced themselves and made requests gun in hand. Whether it was because from every one they believed themselves in danger or because they simply did not know any better, I still am unable to decide. With no other army have I seen an officer threaten with a pistol an unarmed civilian. Were an American or English officer to act in such a fashion he might escape looking like a fool, he certainly would feel like one. The four soldiers the officer told off to guard us climbed with alacrity into our cab and drove with us until the street grew too narrow both for their regiment and our taxi, when they chose the regiment and disappeared. We paid off the cabman and followed them. To reach the front there was no other way, and the very openness with which we trailed along beside their army, very much like small boys following a circus procession, seemed to us to show how innocent was our intent. The column stretched for fifty miles. Where it was going we did not know, but, we argued, if it kept on going and we kept on with it, eventually we must stumble upon a battle. The story that at Hal there had been a fight was evidently untrue; and the manner in which the column was advancing showed it was not expecting one. At noon it halted at Brierges, and Morgan decided Brierges was out of bounds and that the limits of our "environs" had been reached.

"If we go any farther," he argued, "the next officer who reads our papers will order us back to Brussels under arrest, and we will lose our laissez-passer. Along this road there is no chance of seeing anything. I prefer to keep my pass and use it in 'environs' where there is fighting." So he returned to Brussels. I thought he was most wise, and I wanted to return with him. But I did not want to go back only because I knew it was the right thing to do, but to be ordered back so that I could explain to my newspapers that I returned because Colonel This or General That sent me back. It was a form of vanity for which I was properly punished. That Morgan was right was demonstrated as soon as he left me. I was seated against a tree by the side of the road eating a sandwich, an occupation which seems almost idyllic in its innocence but which could not deceive the Germans. In me they saw the hated Spion, and from behind me, across a ploughed field, four of them, each with an automatic, made me prisoner. One of them, who was an enthusiast, pushed his gun deep into my stomach. With the sandwich still in my hand, I held up my arms high and asked who spoke English. It turned out that the enthusiast spoke that language, and I suggested he did not need so many guns and that he could find my papers in my inside pocket. With four automatics rubbing against my ribs, I would not have lowered my arms for all the papers in the Bank of England. They took me to a café, where their colonel had just finished lunch and was in a most genial humor. First he gave the enthusiast a drink as a reward for arresting me, and then, impartially, gave me one for being arrested. He wrote on my passport that I could go to Enghien, which was two miles distant. That pass enabled me to proceed unmolested for nearly two hundred yards. I was then again arrested and taken before another group of officers. This time they searched my knapsack and wanted to requisition my maps, but one of them pointed out they were only automobile maps and, as compared to their own, of no value. They permitted me to proceed to Enghien. I went to Enghien, intending to spend the night and on the morning continue. I could not see why I might not be able to go on indefinitely.

As yet no one who had held me up had suggested I should turn back, and as long as I was willing to be arrested it seemed as though I might accompany the German army even to the gates of Paris. But my reception in Enghien should have warned me to get back to Brussels. The Germans, thinking I was an English spy, scowled at me; and the Belgians, thinking the same thing, winked at me; and the landlord of the only hotel said I was "suspect" and would not give me a bed. But I sought out the burgomaster, a most charming man named Delano, and he wrote out a pass permitting me to sleep one night in Enghien.

"You really do not need this," he said; "as an American you are free to stay here as long as you wish." Then he, too, winked.

"But I am an American," I protested.

"But certainly," he said gravely, and again he winked. It was then I should have started back to Brussels. Instead, I sat on a moss- covered, arched stone bridge that binds the town together, and until night fell watched the gray tidal waves rush up and across it, stamping, tripping, stumbling, beating the broad, clean stones with thousands of iron heels, steel hoofs, steel chains, and steel-rimmed wheels. You hated it, and yet could not keep away. The Belgians of Enghien hated it, and they could not keep away. Like a great river in flood, bearing with it destruction and death, you feared and loathed it, and yet it fascinated you and pulled you to the brink. All through the night, as already for three nights and three days at Brussels, I had heard it; it rumbled and growled, rushing forward without pause or breath, with inhuman, pitiless persistence. At daybreak I sat on the edge of the bed and wondered whether to go on or turn back. I still wanted some one in authority, higher than myself, to order me back. So, at six, riding for a fall, to find that one, I went, as I thought, along the road to Soignes. The gray tidal wave was still roaring past. It was pressing forward with greater speed, but in nothing else did it differ from the tidal wave that had swept through Brussels.