"successfully harnessed" — Collocation dictionary inglés

Automatic translation (We do not guarantee its correctness): z powodzeniem wykorzystać
  1. harness verbo + successfully adverbio
    Very loose collocation

    Likely the man was somewhere cursing his luck; the French certainly would have learned that the egg had been captured by now, even if they did not know that it had hatched an Imperial, or that Temeraire had been successfully harnessed.