Mary Brewster Hazelton (Massachusetts, 1868 - 1953), impressionist oil on panel of summertime New England field and pond, signed "Mary B Hazelton" and dated "1927" on verso. Board measures 9" x 12" and as framed 12 1/2" x 15 1/2"
To learn more about this underappreciated female artist, see her Wikipedia article here.