Randall Garrett, The Best of Fences (1955)
“ Parmay pushed Tallen aside and headed for the communicator.The news hit Earth like a slug in the teeth. For the second time in half a millennium the human race was brought face to face with the fact that it was not the only intelligence in the galaxy, much less in the whole universe.The instant the news came, a fleet of armed ships was given its orders, and within six hours they were squirting through hyperspace toward Therbis. ”
