CSM Friday Lecture Series: Searching for the Lost Tracks of the Underground Railroad through Southern Maryland. Feb. 8, 7 p.m., College of Southern Maryland, Center for Business and Industry, BI-113, La Plata Campus, 8730 Mitchell Rd, La Plata. As part of the CSM Friday Lecture Series, the Charles County 350th Celebration Committee, in cooperation with the Charles County Heritage Commission presents Vincent O. Leggett, founder of Blacks on the Chesapeake Foundation. His lecture, Searching for the Lost Tracks of the Underground Railroad through Southern Maryland, will illustrate the role Charles County played in helping slaves escape to freedom. Free. 301-934-7703 or 301-870-2309, ext. 7703 for Charles County; 240-725-5499, Ext. 7703 for St. Marys County or 443-550-6169, Ext. 7703 for Calvert County or visit www.csmd.edu or www.explorecharlescomd.com/350th/.