"That hellish compound will burn for hours! And in three minutes this whole place will be a roaring furnace! Out of here--out--away! We must save the hangar, at all hazards!" Against their will, but absolutely unable to approach the now wildly-roaring fire on the floor that marked the spot where Brevard had fallen in the Battle with Plutocracy, the comrades quickly retreated.
Raging fire now hemmed them on three sides.

Their only avenue of escape was through the eastern windows, eight or ten feet above the ground.
Hastily snatching up such of the plans and papers as he had not already secured--and some of these already were beginning to smoke and turn brown, in the infernal heat--Gabriel shielded Catherine's retreat.

The others followed.
Craig and Grantham first jumped from the windows, then caught Mrs.
Grantham and Catherine as Gabriel helped them to escape.

He himself was the last to leave the room, now a raging furnace.

Together they all ran from the building, and none too soon; for suddenly the roof collapsed, a tremendous burst of crackling flames and sheaved sparks leaped high above the tree-tops, and the walls came crashing in.
In the welter of incandescence, where now only the stone chimney stood--and this, too, was already cracking and swaying--Brevard had found his tomb, together with the two Air Trust spies.