A depth charge dropped within twenty yards of its target meant a probable victory; a depth charge dropped thirty yards away meant a certain failure. The difference between twenty and thirty yards could be accounted for by the difference between the prompt reactions of a practiced operator and the tardy reactions of an unpracticed one. And that still left out of consideration the question of nerve; there was no way of knowing as yet whether Ellis was nervous or cool, which was not the same thing as being cowardly or brave. A man could grow flustered merely at the thought of failure, without
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