Some of the links, funnily, are based on "real" links: https://www.cs.cmu.edu/~fp/courses/lp/lectures.html is broken but https://www.cs.cmu.edu/~fp/courses/lp/ is the page for a Logic Programming course.

https://www.cs.purdue.edu/homes/hosking/726/html/prolog_list... is broken, but there are many pages in the format https://www.cs.purdue.edu/homes/hosking/XXX corresponding to courses taught by that guy, but 726 is nonexistent.