CSMs Friday Night Lecture Series: In Search of the Algonquian-Speaking Indians of the Patuxent River Valley. 7 p.m., April 9, College of Southern Maryland, Prince Frederick Campus, Room 119, 115 J.W. Williams Road, Prince Frederick. CSMs Friday Night Lecture Series presents Tri-County Council Executive Director Wayne Clark to discuss archaeological and historical evidence discovered about the Algonquian-speaking Native Americans of the Patuxent River Valley including social customs and observations made by European settlers of the time. Free. 301-934-7703, 240-725-5499, 443-550-6199, 301-870-2309, Ext. 7703 or www.csmd.edu.