The Schenectady County Historical Society at 32 Washington Avenue will present a lecture by Shirley W. Dunn. The 2 pm lecture will be based on her latest book, “The River Indians: Mohicans Making History.” A major part of the talk will be about Arent Van Curler’s close connections with Mohicans living around Beverwijck, connections made through a village, his farm at the Flatts and various purchases of Mohican land.