Sentence:  The clerk promised that he would; and Scrooge walked out with a <WSD>growl</WSD>. The office was closed in a twinkling, and the clerk, with the long ends of his white comforter dangling below his waist (for he boasted no great-coat), went down a slide on Cornhill, at the end of a lane of boys, twenty times, in honour of its being Christmas Eve, and then ran home to Camden Town as hard as he could pelt, to play at blindman's-buff. 
Meaning of the word marked with <WSD> tags:  An aggressive grumbling.