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Rh them where Treves lay. Jack understood that they had passed beyond the line of the captured province of Lorraine, and were speeding above genuine German territory. It gave him something akin to satisfaction to know that no matter where they dropped those big bombs now they were bound to do damage more or less to the enemy country.

Still they moved forward. The head pilot changed the course as frequently as he saw fit, but often they were out of sight of the twisting river below; though a little later on they would again cross it.

An hour passed. Jack figured that possibly they had covered a distance approximately seventy miles. When another thirty minutes had gone he believed that they would be at the junction of the Mosel with the world-famous Rhine. Here stands a typical German city, Ehrenbreitstein. He was eager to glimpse the lights of this place, because it would indicate that two-thirds of their dash into the heart of Germany had been successfully accomplished.

In due time all this came about, and as the two air service boys looked far down they could just manage to discover the gleaming silver thread which they knew must be the Rhine, of which they had read and heard so much.