Sentence:  "Yes. He gets to Paris at seven in the morning. He promised to telephone the first thing."/ "You expensive little <WSD>monkey</WSD>!"/ "Why?"/ "It's ten shillings for three minutes, or something like that, and you have to go to the G.P.O. or the Mansion House or some such place, I believe." 
Meaning of the word marked with <WSD> tags:  A mischievous child.