"We'd better ride," decided prudent Roger. "It will be quicker and we'll run no chance of losing our way. Here comes a taxi now. Hail it, Blazes. You know how to parlez-vous."
Immediately complying, Jimmy signaled the driver of the machine. A moment's shrewd bargaining with the latter regarding the fare to the station, and Jimmy motioned his bunkies to step into the motor car.
None of the five observed, as they entered the vehicle, that a man had emerged from the shadows of a neighboring building and signaled another taxicab just driving up to the curb. In consequence, they were not aware that the second taxicab was sedulously keeping on the trail of their own.
[CHAPTER IV]
AN UNSEEN FOE
It was not a long journey to the station for which the Khaki Boys were bound. During the ride they had plenty to say in regard to the interesting trio they had left behind them. What had been rather a dull afternoon had suddenly turned into a red-letter evening. Not only were they jubilant at having again encountered the Twinkle Twins. They had also met one of the great heroes of France, and they could not readily get over it.
Arrived at the station, they were obliged to spend half an hour there before getting a train back to camp. Still absorbed in enthusiastic talk concerning their absent friends, they were not impatient over this little wait.
With the train on time, the five Brothers calculated reaching camp in good season. Once there a few moments' brisk walking would see them safely back in quarters.