Plain Anne Ellis builds on Life of an Ordinary Woman, Anne Ellis's memoir of life in one of Colorado's most overlooked regions, the San Luis Valley. Despite use and settlement by Utes, Hispanics, Jicarilla Apaches, and Anglos, little has been written about the rich history of this valley.   Ellis describes herself as an ordinary widow with few financial resources trying to make a living in an inaccessible valley. But Ellis was far from ordinary: she raised children on her own, sent them to college, worked as a cook and the only woman on crews installing telephone lines and building roads to open the San Luis Valley to development, and successfully ran for county treasurer.   Perhaps the most extraordinary thing about Ellis was her frankness. Ellis admitted that "to have been born in the Victorian era certainly cramps one's style." She was not afraid to put into print her desire for intimacy and love. This and other observations of her life make it clear that Anne Ellis was anything but plain and ordinary.