The Old Saybrook March for Justice will host a march and “teach-in” on Wednesday, Oct. 7, at 5:30 p.m., in Old Saybrook. Participants will gather in front of the Kate. Masks and social distancing are required. The speaker will be Professor David W. Blight of Yale University, a Pulitzer Prize recipient and the author of “Frederick Douglass: Prophet of Freedom.” For more information: osbmarch@gmail.com.