Learn how to safely clean a granite or marble gravestone in just a few hours! All the materials will be provided and we will take you through the process step by step. You will able to take home your Henniker Historical Gravestone Kit for your next visit to a cemetery as well as a certificate of completion! After a quick presentation and demonstration, you will be assigned a stone in need of cleaning at Henniker’s Center Cemetery (behind the town hall). We will be taking ‘before and after’ pictures! Work alone or with a partner (one set of supplies per couple). Space limited! Sign up now, cost is $20.00 (our cost for supplies).