Sentence:  'Butler! Send my rickshaw round to the front at once! To the station, jaldi!' she added as the rickshaw-man appeared, and, having settled herself in the rickshaw, poked him in the back with the <WSD>ferrule</WSD> of her umbrella to start him. 
Meaning of the word marked with <WSD> tags:  A band or cap (usually metal) placed around a shaft to reinforce it or to prevent splitting. (from early 17th c.)