To Kunming from Chungking was four hundred and fifty miles. They took the opportunity to refuel and then pressed on to the most hazardous section of the trip, the five hundred and fifty miles over the Hump to the Assam airfields.

Conditions were appalling, heavy rain and thunderstorms, and the kind of turbulence that threatened to break the plane up. Several hundred aircrew had died making this run over the past couple of years, Campbell knew that. It was probably the most hazardous flying duty in the RAF or the USAF. He wondered what persuaded men to volunteer for such work and while thinking about it, actually managed some sleep, only surfacing as they came into their Assam destination to refuel.

The onward trip to Delhi was another eleven hundred miles and a completely different proposition. Blue skies, considerable heat, and no wind to speak of. The Dakota coasted along at ten thousand feet and Caine, leaving the flying to Giffard, came back and tried to get a couple of hours' sleep.

Campbell dozed again and came awake to find the wireless operator shaking Caine by the shoulder. "Delhi in fifteen minutes, Skipper."

Caine got up, yawning. He grinned at Campbell. "Piece of cake this leg, isn't it?"

As he turned away there was an explosion. Pieces of metal flew off the port engine, there was thick black smoke, and as the propeller stopped turning, the Dakota banked and dived steeply, throwing Caine off his feet.

Campbell was hurled against the bulkhead behind with such force that he was almost knocked senseless. The result was that he couldn't really take in what was happening. There was a kind of nightmare as if the world was breaking up around him, the impact of the crash, the smell of burning and someone screaming.

He was aware of being in water, managed to focus his eyes, and found himself being dragged through a paddy field by a wild-eyed Tanner, blood on his face. The Corporal heaved him onto a dyke, then turned and hurried back, knee-deep in water, to the Dakota which was burning fiercely now. When he was halfway there, it blew up with a tremendous explosion.