Sentence:  But he was a <WSD>reticent</WSD> as well as an eccentric man; and he made no mention of a certain evening when he warmed his hands at the gatehouse fire, and looked steadily down upon a certain heap of torn and miry clothes upon the floor. 
Meaning of the word marked with <WSD> tags:  Keeping one's thoughts and opinions to oneself; reserved or restrained.