Brothers Ben and Sam Adams of York, Pennsylvania, play the drums and fife, respectively, during Sunday’s Fairfield Foundation’s Rick n Roast at the Rosewell Ruins in Gloucester. The event involved constructing a large log structure, or rick, shown at left, then placing oyster shell on top and burning it at 1,600 degrees until the carbon dioxide burned away and the shells turned to calcium oxide. The shells were then gathered and, when mixed with water, will have a chemical reaction and turn to a putty-like substance to be used for plaster for the Timberneck House restoration project, said preservation program coordinator Kenneth Tappan. Those attending were offered tours of the ruins and treated to free Brunswick stew provided by volunteers Mike and Laurie Haurand of Quoin Builders in Lanexa, which will be doing some of the restoration work on Timberneck House....