But intelligence pursued him, providing him with oxygen and with electric heating apparatus in the upper air.

And when, on the other hand, he or his comrade swooped down to within a few hundred feet of the earth, in order to co-operate in attack with infantry or Tanks, again intelligence came into play, inventing a special armoured machine for the protection of the new tactics.
The growth of "wireless," as a means of air-communication, is another astounding chapter in this incredible story.

Only _one_ of the machines which left with the original Expeditionary Force was fitted with "wireless" apparatus, and it was not used till the first Battle of the Aisne, when co-operation with the artillery first began.

There are now 520 officers in the "wireless" branch and 6,200 other ranks; while there are 80 "wireless" stations in France alone and several hundred battery stations.

"Wireless" telephony, too, has been made practical since 1917; and over a range of some 75 miles has been of deadly use to the artillery, especially at night, when the watcher in the skies becomes aware of lighted aerodromes, or railway stations, behind the enemy lines.
"Many wonders there be, but none more wonderful than man," said Sophocles, in the fifth century before Christ, and he gives the catalogue of man's discoveries, as the reflective Greek saw it, at that moment of the world's history.