Sentence:  “Very sorry to <WSD>knock</WSD> you <WSD>up</WSD>, Watson,” said he, “but it's the common lot this morning. Mrs. Hudson has been knocked up, she retorted upon me, and I on you.” 
Meaning of the word marked with <WSD> tags:  To awaken (someone) as by knocking at the door; rouse; call; summon; also, to go door-to-door on election day to persuade a candidate's supporters to go to the polling station and vote. See also (knocker up). (from 17th c.)