Chapter 3 explains the methods of scribes for ruling manuscripts of English literature in the fifteenth century, from a variety of works but especially those of Thomas Hoccleve. It notes that scribes imposed geometric designs onto materials hylomorphically. It then contrasts their failures to achieve regular design. It suggests that ruling patterns seldom had a practical function to articulate the text by means of page design, but that ruling was sometimes a craft process pursued almost habitually by scribes, and at other times was an inherited convention with a force of its own. It concludes that ruling on the material pages was less important to scribes than the immaterial ideas that governed page design. Ruling was ultimately jettisoned.