Gloomily

Baker Street was like an oven, and the glare of the sunlight upon the yellow brickwork of the house across the road was painful to the eye. It was hard to believe that these were the same walls which loomed so gloomily through the fogs of winter.

[T]he sedate monk's hood lifted its head still higher and looked gloomily and wickedly down on it, while it nodded and kept time to the cuckoo's song, as if it were counting how many days it had to live.

He was gloomily informative on points of law, of which the storehouse of his mind appeared to be well supplied.