Here are two articles explaining traditions and myths about Saint Patrick:
The Facts, Myths and Traditions of St. Patrick's Day:
http://news.nationalgeographic.com/news/2011/03/110316-saint-patricks-day-2011-march-17-facts-ireland-irish-nation/
Who Was Saint Patrick?
http://news.discovery.com/history/who-was-st-patrick.html#mkcpgn=rssnws1