Born ca. Jun 1888 in [Kent Co.], Delaware

Bertha's age in the census records: in 1900, age 11 (b. Jun 1888).
In 1900 Bertha resided in the household of Frederick H and Hester (Dean) Seeney. She was reported to be their niece.

1900 - U.S. Census, Delaware, Kent Co., Kenton Hundred, E.D. 70, Sheet No. 3B [=107 verso], 53-54, 04 Jun 1900