Olive was the wife of Silas Adair. She was a 1903 graduate of West Chester State Normal School (a former teachers' college, now West Chester University) which matches her occupation shown on censuses, that of teacher.
Olive and Silas would have two children, Russel N. Adair and Eulia M. Adair.
More information is being sought presently.
Olive's grandparents lived with her and Silas and their kids on the 1920 census. They were her mom's parents based on the surname- Nathan B and Mary Dana, from Vermont.
With the exception of a small spelling difference (Mc instead of Mac-Collum) this matches up with information found in The Dana Family in America, Dana Genealogical Committee, pub. Higginson Book Company, 1956:
Nathan Barnet Dana (Nathan Barnet, Isaac, John W., Isaac, Benjamin, Richard) born Pomfret, Vt., Jan 16 1834; married Woodstock Vt., Dec 5, 1861, Mary Isabel Wyatt, born Dewey's Mills, Vt., Jan. 13, 1840, daughter of Samuel and Juliette (Dewey) Wyatt. He is a carpenter and a Unitarian. Res. Pomfret, VT, Radnor and Conshohocken, PA, 1917.
i. Eulia Mary, b. Hartford, VT, July 29, 1862; d. Jan 9, 1897; m. Joseph E. McCollum (not living in 1917). Children born in Conshohocken, Pa:
1. Olive M. McCollum, m. Silas G. Adair of Conshohocken.
children: (1) Russell N. Adair b. June 4, 1908. (2) Eulia M. Adair, b. Aug. 16, 1911.
2. Louise M. McCollum, b. Nov. 5, 1885; m. Elmer E....