blackly

One blackly funny screed in the book is directed at Harry and David's gift baskets.

By and by, a straggling birch bluff rose blackly across their way, but nobody swung wide.

"Sure it's a word I'd like to have with you, young man," he growled, frowning blackly.

There's just one thing I'd like to know, Houston thought blackly.

Jack regarded Dick blackly for the fraction of a second; then he burst into a laugh, and clapped him on the shoulder.

He felt himself in one way innocent, but he felt himself in another way blackly guilty.