\Dark"ly\, adv.
1. With imperfect light, clearness, or knowledge; obscurely;
   dimly; blindly; uncertainly.

         What fame to future times conveys but darkly down.
                                               --Dryden.

         so softly dark and darkly pure.       --Byron.

2. With a dark, gloomy, cruel, or menacing look.

         Looking darkly at the clerguman.      --Hawthorne.