After the release of the bombs, Jock climbed up through the clouds and steered a direct course for home. Since the ground could not be studied because of the intervening clouds, the aviators devoted their entire attention to compass, time, and the stars. During this flight above the clouds the efficiency of the Hun's sound instruments was thoroughly demonstrated, for, although the clouds were too dense for any searchlight to penetrate and this effectually screened the machine from observation from below, again and again Jock's plane was surrounded by the black puffs of bursting anti-aircraft shells. After flying for a sufficient number of hours to bring them above their aerodrome, if their calculations were correct, Jock and his companion discussed the advisability of coming down through the clouds; the unanimous decision, however, was to continue on until a lack of petrol would force them to land, for changes in wind might have created a considerable error in their calculations, unchecked as they were by observations of landmarks; so after flying for another hour they came down through the clouds and succeeded in making a safe landing near a small French village just before their supply of petrol was exhausted. III One evening in August, 1918, there was a strong southwest wind blowing across the eastern part of France and severe thunderstorms were reported to be approaching. Nevertheless, certain Bedouins were selected to raid the railway station and sidings at Frankfort; "intelligence" having reported important rail movements in that vicinity. The Bedouins were ordered to return if they found, after testing the air, the weather conditions unfavorable for a flight of such long distance. As an alternative target to Frankfort they were given the Burbach Hutte Works at Saarbrucken. After gaining their height above the aerodrome, Jock and his navigation officer steered a direct course for "D" lighthouse, situated north of Barcarat and but a few miles from the front-line trenches. Having accurately figured their drift and ground speed on this course, Jock and his companion calculated that, by steering a straight course to Frankfort, spending five minutes over the target, and steering a straight course back to their aerodrome, they could make sufficient headway against the wind on the return voyage to bring them safely home with a ten minutes' supply of petrol left in their tanks; any error in course necessitating a deviation, or any increase in the velocity of the wind, might mean a prolonged sojourn in a German prison camp if not subjection to the well-known tortures of a German hospital.