St. Raymond Nonnatus - Short biography. - http://www.catholic.org/saints/saint.php?saint_id=314
Catholic Encyclopedia - St. Raymond Nonnatus (d. 1240) was a Mercedarian. The main apostolate of the Order was ransoming Christian slaves, and when St. Raymond ran out of money, he offered himself as a hostage. - http://www.newadvent.org/cathen/12671b.htm
Patron Saints Index - Profile of Raymond (or "Raymund") Nonnatus. - http://www.catholic-forum.com/saints/saintr09.htm