The Medfield Historical Society will offer a talk Monday from 7:30 to 8:30 p.m. on the events leading up to the separation of Medway from Medfield. Then, members of the Medway Historical Society will discuss the first few years of Medway’s existence as a separate town. The presentation, part of Medway's yearlong 300th anniversary celebration, will be held at First Parish Unitarian Universalist, 26 North St. For more information, visit the society’s website, www.medwayhistoricalsociety.org .