through all ran the purr of countless propellers cutting water and air.
I had not dared pull my speed lever to the highest for fear of overrunning the mouth of the shaft that passed from Omean's dome to the world above, but even so we were hitting a clip that I doubt has ever been equalled on the windless sea.
The smaller fliers were commencing to rise toward us when Xodar shouted: "The shaft! The shaft! Dead ahead," and I saw the opening, black and yawning in the glowing dome of this underworld.
A ten-man cruiser was rising directly in front to cut off our escape. It was the only vessel that stood in our way, but at the rate that it was traveling it would come between us and the shaft in plenty of time to thwart our plans.
It was rising at an angle of about forty-five degrees dead ahead of us, with the evident intention of combing us with grappling hooks from above as it skimmed low over our deck.
There was but one forlorn hope for us, and I took it. It was useless to try to pass over her, for that would have allowed her to force us against the rocky dome above, and we were already too near that as it was. To have attempted to dive below her would have put us entirely at her mercy, and precisely where she wanted us. On either side a hundred other menacing craft were hastening toward us. The alternative
