Sentence:  I would ask for the pleasure of your company, Mr. Knightley, but I am a very slow <WSD>walker</WSD>, and my pace would be tedious to you; and, besides, you have another long walk before you, to Donwell Abbey. 
Meaning of the word marked with <WSD> tags:  (walk"): a person who walks or a thing which walks, especially a pedestrian or a participant in a walking race.