His appearance, after visiting Mrs. Smallweed with one of these admonitions, is particularly impressive and not wholly prepossessing, firstly because the exertion generally twists his black skull-cap over one eye and gives him an air of goblin rakishness, secondly because he mutters violent imprecations against Mrs. Smallweed, and thirdly because the contrast between those powerful expressions and his powerless figure is suggestive of a baleful old malignant who would be very wicked if he could. 
He mutters baleful and violent imprecations against Mrs. Smallweed. 