Here is the background to the Bill of Rights: http://law2.umkc.edu/faculty/projects/ftrials/conlaw/billofrightsintro.html
Read the whole thing, including the rights that Madison included which were rejected!
http://www.archives.gov/exhibits/charters/bill_of_rights_transcript.html
Here is an interesting site– the Bill of Rights Institution: http://billofrightsinstitute.org