A handful of pilots, of whom Mermoz was one, surveyed the CasabIanca-Dakar line across the territory inhabited by the refractory tribes of the Sahara. Motors in those days being what they were, Mermoz was taken prisoner one day by the Moors. The tribesmen were unable to make up their minds to kill him, kept him a captive a fortnight, and he was eventually ransomed. Whereupon he continued to fly over the same territory.

When the South American line was opened up Mermoz, ever the pioneer, was given the job of surveying the division between Buenos Aires and Santiago de Chile. He who had flung a bridge over the Sahara was now to do the same over the Andes. They had given him a plane whose absolute ceiling was sixteen thousand feet and had asked him to fly it over a mountain range that rose more than twenty thousand feet into the air. His job was to search for gaps in the Cordilleras. He who had studied the face of the sands was now to learn the contours of the peaks, those crags whose scarfs of snow flutter restlessly in the winds, whose surfaces are bleached white in the storms, whose blustering gusts sweep through the narrow walls of their rocky corridors and force the pilot to a sort of hand-to-hand combat. Mermoz enrolled in this war in complete ignorance of his adversary, with no notion at all of the chances of coming forth alive from battle with this enemy. His job was to “try out” for the rest of us. And, “trying out” one day, he found himself prisoner of the Andes.

Mermoz and his mechanic had been forced down at an altitude of twelve thousand feet on a table-land at whose edges the mountain dropped sheer on all sides. For two mortal days they hunted a way off this plateau. But they were trapped. Everywhere the same sheer drop. And so they played their last card.

Themselves still in it, they sent the plane rolling and bouncing down an incline over the rocky ground until it reached the precipice, went off into air, and dropped. In falling, the plane picked up enough speed to respond to the controls. Mermoz was able to tilt its nose in the direction of a peak, sweep over the peak, and, while the water spurted through all the pipes burst by the night frost, the ship already disabled after only seven minutes of flight, he saw beneath him like a promised land the Chilean plain.

And the next day he was at it again.

When the Andes had been thoroughly explored and the technique of the crossings perfected, Mermoz turned over this section of the line to his friend Guillaumet and set out to explore the night. The lighting of our airports had not yet been worked out. Hovering in the pitch black night, Mermoz would land by the faint glimmer of three gasoline flares lined up at one end of the field. This trick, too, he taught us, and then, having tamed the night, he tried the ocean. He was the first, in 1931, to carry the mails in four days from Toulouse to Buenos Aires. On his way home he had engine trouble over a stormy sea in mid-Atlantic. A passing steamer picked him up with his mails and his crew.

Pioneering thus, Mermoz had cleared the desert, the mountains, the night, and the sea. He had been forced down more than once in desert, in mountain, in night, and in sea. And each time that he got safely home, it was but to start out again. Finally, after a dozen years of service, having taken off from Dakar bound for Natal, he radioed briefly that he was cutting off his rear right-hand engine. Then silence.

There was nothing particularly disturbing in this news. Nevertheless, when ten minutes had gone by without report there began for every radio station on the South Atlantic line, from Paris to Buenos Aires, a period of anxious vigil. It would be ridiculous to worry over someone ten minutes late in our day-to-day existence, but in the air-mail service ten minutes can be pregnant with meaning. At the heart of this dead slice of time an unknown event is locked up. Insignificant, it may be; a mishap, possibly: whatever it is, the event has taken place. Fate has pronounced a decision from which there is no appeal. An iron hand has guided a crew to a sea-landing that may have been safe and may have been disastrous. And long hours must go by before the decision of the gods is made known to those who wait.