After second and third thoughts, most of the page markers are gone. They seem to bring more harm than good, hindering readability and drawing unnecessarily attention. Besides, we may want to move the content to LaTeX source for example and don't want to deal with - in such case - completely unnecessary artefacts of the original typesetting then. Only markers denoting intentional page breaks are left in but shortened to the four marker bytes only. Other than that: Chapter 3 processed already