They were flying at fifteen thousand feet when, just after crossing Cuba, they ran into one of those violent tropical storms that suddenly turn aircraft from comfortable drawing-rooms into bucketing deathtraps. The great plane staggered and plunged, its screws now roaring in vacuum and now biting harshly into walls of solid air. The thin tube shuddered and swung. Crockery crashed in the pantry and huge rain hammered on the perspex windows.
