The Cooperstown School District Records consists of records accumulated by Myrtle Porterville who took an early interest in the history of Griggs County. She did extensive research and collecting while teaching in Cooperstown. Organization and file folder label is based in large part upon her original folder labeling and organization. Most of the records date from 1883 to 1919. There is only a single document from 1931 and 1959. These records originally were a portion of her donation which became Mss 296 titled “Myrtle (Bemis) Porterville Collection”.