Daughter of David W Harmon and Martha A Jackson
Born ca. 1872 in [East South Murderkill Hundred, Kent Co.], Delaware

Isabelle's age in the census records: in 1880, age 8; in 1900, age 26 (b. Nov 1873).
In 1880 Isabelle was reported under the name Lizzie Harmon.

1880 - U.S. Census, Delaware, Kent Co., East South Murderkill Hundred, E.D. 41, Page No. 59 [=309C], 554-554, 29 Jun 1880
1900 - U.S. Census, Delaware, Kent Co., East South Murderkill Hundred, E.D. 79, Sheet No. 14B [=312 verso], 293-303, 21 Jun 1900