You're talking about the comic at the front and how the Elder Scrolls talk about the past an the future of Tamriel What you have to remember is back in the early 90's if you sent in your registration card you actually got newsletters sent to you regularly. The internet was also around then, in the form of BBS's (Bulletin Board Systems), but many gamers wrote and posted actual letters to publishers back then (and got replies), as there was a closer relationship between the publishers and gamers a couple decades ago!
I was a gamer and worked in the games business back then. It was good times. The Redguard manual just shows a glimpse into that world!