Sentence:  At twilight in the summer there is never anybody to fear—man, woman, or cat—in the chambers and at that hour the mice come out. They do not eat parchment or <WSD>foolscap</WSD> or red tape, but they eat the luncheon crumbs. 
Meaning of the word marked with <WSD> tags:  Such a sheet folded or cut in half, thus approximately 8 x 13.25 inches.