Second Stage Lensmen by E.E. Smith

As Haynes and the Galactic Council had already surmised, Boskonia was now entirely upon the defensive. She had made her supreme bid in the effort which had failed so barely to overcome the defenses of hard-held Tellus. It was, as has been seen, a very near thing indeed, but the zwilnik chieftains did not and could not know that. Communication through the hyperspatial tube was impossible, no ordinary communicator beam could be driven through the Patrol's scramblers, no Boskonian observers could be stationed near enough to the scene of action to perceive or to record anything that had occurred, and no single zwilnik ship or entity survived to tell of how nearly Tellus had come to extinction.

And, in fine, it would have made no difference in the mind of Alcon of Thrale if he had known. A thing which was not a full success was a complete failure; to be almost a success meant nothing. The invasion of Tellus had failed. They had put everything they had into that gigantically climactic enterprise. They had shot the whole wad, and it had not been enough. They had, therefore, abandoned for the nonce humanity's galaxy entirely, to concentrate their every effort upon the rehabilitation of their own depleted forces and upon the design and construction of devices of hitherto unattempted capability and power.