midnight
was the answer . `` They are a wise nation , whose eyes are never shut ; much do I wonder , that they have not seen the great medicine of the Big-knives ! '' `` Wagh ! '' exclaimed his companion , suffering the whole of his amazement to burst out of his dark rigid countenance at the surprise , like a flash of lightning illuminating the gloom of midnight . `` The Dahcotah knows that my tongue is not forked . Let him open his eyes wider . Does he not see a very great medicine ? ''