I recently came across this post by Professor Orin Kerr at The George Washington University School of Law reporting that Harvard Law School examinations since 1871 are available online.  Since I've been reading Melvin Urofsky's Louis D. Brandeis: A Life, I thought it would be interesting to take a look at the examinations that Louis Brandeis would have taken while a student at Harvard in 1875-1877.  Here is a link to the Corporations examination.  Sorry, I didn't find an answer key.