Bedlinen item (7)
(Other definitions for sheet that I've seen before include "Piece of paper, linen, or water" , "leaf" , "Whence to sing hymns?" , "Large piece of fabric" , "Piece of paper or bedding" .)
(Other definitions for valance that I've seen before include "Decorative piece to conceal fixtures, of curtains perhaps" , "Hanging border of drapery" , "Decorative frill, on curtain say" , "Lace van (anag) - piece of decorative screening material attached to a bed frame" , "Hung strip of fabric" .)