TRIPTYCH ANCHORS PLEIN AIR SHOW Fenimore Exhibit Brings Mary Nolan's Art Indoors By JIM KEVLIN • Special to www.AllOTSEGO.com Artist Mary Nolan at the Railroad Avenue studio she shares with May-Britt Joyce and Maria Tripp. The dominant painting is “River Bend, Low Tide.” (Jim Kevlin/AllOTSEGO.com) Some 25 years ago, when she was Cooperstown Chamber of Commerce executive director, Polly Renckens held a meeting of people with space to spare in their homes. “We have tourists,” Polly told the gathering. “We…