“Russians!” exclaimed Bob. “See those flags! Russians on the way to reinforce either the army invading Austria or their comrades fighting the Germans in East Prussia is what they are!”

The appearance of the big airship caused the greatest confusion in the ranks. The cavalry galloped wildly this way and that; infantrymen broke their regular marching formation to scatter and fire their guns futilely at it; the cannon were hurriedly unlimbered and efforts made to elevate their muzzles which would bring the Flyer within range.

The young aeronauts could not help laughing at the disorder their approach caused, and agreed with Ned that it was better not to get too close to the Russians. So the airship was raised to a greater altitude and took a southwesterly course.

“Why this particular direction?” queried Alan. “We have no idea where we are except that it is Russian territory, which may mean Siberia or Lapland.”

“Well,” said Ned, “we want to get back to the seat of war, and it’s a pretty safe bet that those Russians are bound for there by the shortest possible route. They are headed in a southwesterly direction, so it stands to reason that if we follow the same course, we’ll arrive somewhere near their destination.”

This was a logical deduction, so the Flyer was held to that position, and all sight of the army was soon lost in their rear.

For perhaps three hours the character of the underlying landscape remained the same as when it first was sighted. After that it gradually began to vary, assuming a more rolling aspect, with considerable stretches of forestland. Indications of snow became less frequent; cultivated fields began to appear here and there, then little villages and finally a large city. Several towns of considerable size were passed over, but the airship was flying at too great an altitude for the boys to see much of them or to locate more exactly where they were.

By this time the sun was sinking, and there was danger of the Flyer’s passing completely over and beyond the “theater of war” in the darkness. Alan and Bob counseled a descent to earth for the night. This seemed to be a pretty safe procedure, as the vessel could be got under way again within a few minutes should any unexpected need arise, and it would, further, give the weary young aeronauts a chance to stretch their limbs and inhale some fresh air.

After a short discussion it was decided to do this. Sweeping in a diminishing spiral downward, the boys sighted a little village nestled snugly in a valley. The smoke from fires where goodwives were cooking the evening meal, arose in delicate streams in the calm air. Here and there a light already twinkled in a cottage window. Peasants were just driving the lowing cattle home for milking.

“Let’s land over there!” exclaimed Buck. “I’m fairly hungry for the sight of somebody who won’t shoot before asking who you are, and, aside from that, I’ll bet that these simple folk would be willing to set us up a regular homelike meal!”