PEG GILBERT, left, whose great great grandfather was a cousin to Mari Sandoz, portrayed Sandoz for the Monday Night at the Museum program on April 22. Leroy Mitchel of Adams, center, originally from Tecumseh, made a special effort to meet Peg after her program because he had met Sandoz as a young man when he was working at the Cornhusker Hotel in Lincoln. Diane Baird of Tecumseh, right,…