Summer 2017 Tilton Library – Build a Better World – Tour Memorial Hall Museum with Pocumtuck Valley Memorial Association (PVMA) director Tim Neumann. PVMA was one of the first historical preservation societies in the country. PVMA will be launching a website this summer – Impressions from a Lost World: The Discovery of Dinosaur Tracks in New England that Changed 19th Century America Tours are offered at 11, 1:30 and 3 and are free for Tilton Library patrons.