As the men piled into their ship they tried not to worry about this danger spot; yet there was no denying the risk. Belted into his co-pilot’s seat, Hap Newton warmed up the four big engines. Slowly he increased the r.p.m. until _Rosy O’Grady_ was straining to be off. The mighty slipstream ripped jungle foliage and tossed the fragments of her camouflage screen.