In recognition of the 70th anniversary of the civil rights ruling in Brown v. Board of Education, in which the Supreme Court ruled separating children in public schools on the basis of race was unconstitutional, the Lewes Public Library will host an expert discussion, “Collins Seitz: How One Trial Judge Helped Usher in a New Day of Racial Justice in Delaware,” at 5 p.m., Tuesday, Oct. 22, at the library, 111 Adams Ave., Lewes, and live online via Zoom.