Zwaanendael Museum, 102 Kings Highway, Lewes. Celebrate the anniversary of Nov. 16, 1776 when an American warship sailed into the harbor of the Dutch island of St. Eustatius in the West Indies and was greeted by a friendly salute, the first ever given by a foreign power to the flag of the newly-independent United States. Activities include Dutch crafts, historical information and, at 2pm, “An Overview of the Environmental History of the Delmarva Peninsula,” a lecture by historic-site interpreter Alan Roth. Zwaanendael Museum, 102 Kings Highway, Lewes. Environmental history lecture on the museum’s 2nd floor (entry via staircase; no elevator). Museum open 10 a.m.–4:30 p.m. Free admission but, due to space restrictions, reservations for the lecture are required by calling 302-645-1148 no later than Nov. 17, 2017.