Sentence:  Thenne syr Percyual aspyed that therin was a man or a woman / for the vysage was couerd / thenne he left of his lokyng and herd his seruyse / And whan hit came to the sacrynge / he that lay within that Percloos dressid hym vp and vncouerd his heede / and thenne hym besemed a passynge old man / and he had a crowne of gold vpon his hede<!--Prior quote:he that lay within the <WSD>perclose</WSD> dressyd hym up and uncoverde hys hede; and than hym besemed a passyng olde man, and he had a crowne of golde uppon hys hede--> 
Meaning of the word marked with <WSD> tags:  An enclosed area, especially one separated from the main body of a building by a screen or partition.