Sentence:  The noise in this room was perfectly <WSD>tumultuous</WSD>, for there were more children there, than Scrooge in his agitated state of mind could count; and, unlike the celebrated herd in the poem, they were not forty children conducting themselves like one, but every child was conducting itself like forty. 
Meaning of the word marked with <WSD> tags:  Characterized by loud, confused noise. (from mid 16th c.)