General Relativity

You seem to have followed an out-of-date link, I'm afraid. You're either looking for:

• Norman Gray's A3/4/5 GR course page, at http://www.astro.gla.ac.uk/users/norman/lectures/A345GR/, most of which is available only on the GU campus,
• ...or the public version of the same course (which is almost identical, but without problem sets, and a few fixed typos), at http://purl.org/nxg/text/general-relativity