Another solid research find from The Virtual Chase:
"The University of Minnesota Law School sponsors this site on the First Amendment. It makes available various primary and secondary sources of information, including U.S. Supreme Court opinions, select appellate court opinions, copies of original sources
discussed in classic U.S. Supreme Court decisions, relevant historical documents and public opinion research results.
"Many of the documents are available in PDF format. There is no search feature. Our only concern is the site appears not to have been updated in about 2 years."