‘The Fundamental Principles of Criminal Justice’ by Simeon E. Baldwin http://digitalcommons.law.yale.edu/cgi/viewcontent.cgi?article=5325&context=fss_papers

‘A treatise on the system of evidence on trials at the common law: including the statutes and judicial decisions of all jurisdictions of the United States’
http://archive.org/stream/cu31924020192393/cu31924020192393_djvu.txt

Harvard University’s Justice – a website featuring a number of lectures
http://www.justiceharvard.org/watch