The conservation of a room with the wallpaper painted one color is discussed in the context of a continuing project at a historic house. The treatment problems of such a wallpaper are contrasted with those of pattemed wallpapers. The wallpaper was surface cleaned, mended, readhered to the wall at areas of detachment, and losses were filled and inpainted. The advantages and disadvantages of several treatment procedures and materials are discussed. -- AATA