After 30 years, Pennypack’s executive director David Robertson is retiring.  Drop by between 2-4 p.m. to send David and his wife, Mary, off in style at a gathering in the Visitor Center for members, friends, and well-wishers.  In addition, you’ll have a chance to meet and welcome the Trust’s new executive director, Christopher T. Mendel.  The Trust will provide refreshments.  Please register so that we can get an estimate of refreshments.