Sentence:  [I]n the corner room a sitting platform, 3 ft. broad, as well as a large fireplace, were brought to light, while in the hall (E. iii.), open towards the south, the rough plaster surface of the partly well-preserved east wall proved to be covered with <WSD>sgraffiti</WSD> both Tibetan and Chinese. 
Meaning of the word marked with <WSD> tags:  An instance or sample of sgraffito.