What's the deal with the stuff in the footer of this page? "The original page disappeared a couple of years ago. This is an unauthorized copy." It links to http

What's the deal with the stuff in the footer of this page? "The original page disappeared a couple of years ago. This is an unauthorized copy." It links to http://www.svendtofte.com/code/curried_javascript/ http://www.svendtofte.com/code/curried_javascript/ which I guess is the original article?