In Maine, Vital Records, 1670-1907 she is listed as Josephine B C Tobin, born in 1835 in Lincoln, Maine. Looks like she never married.

In 1850 census

Event Place: Lincoln, Penobscot, Maine, United States

Household Gender Age Birthplace
John Tobin M 46 Maine
Abigail Tobin F 46 Maine
Delphina Tobin F 19 Maine (father John Tobin, mother Esther Young)
Oliva Tobin F 17 Maine (father John Tobin, mother Esther Young)
Josephin Tobin F 14 Maine
John F Tobin M 10 Maine
Abigail Tobin F 8 Maine
Horace K Tobin M 4 Maine

In 1860 census

Event Place: Lincoln, Penobscot, Maine, United States

John Tobin M 57 Maine
Abigail Tobin F 57 Maine
Josephine Tobin F 24 Maine
John F Tobin M 20 Maine
Abbie Tobin F 18 Maine
Horace Tobin M 14 Maine

In 1870 census

Event Place: Maine, United State

Household Gender Age Birthplace
John Tobin M 67 Maine, United States
Abagail Tobin F 67 Maine, United States
Josephine B Tobin F 35 Maine, United States
Abbie Tobin F 27 Maine, United States

Her occupation is tailoress
In 1880 census

Event Place: Lincoln, Penobscot, Maine, United States

Self John Tobin M 77 Maine, United States
Wife Abigal Tobin F 77 Maine, United States
Daughter Abbie Tobin F 36 Maine, United States
Daughter Josephine B. Tobin F 41 Maine, United States

In 1900 Census she lived with her sister and her sister's husband.
Event place: North Andover Surplus, West Andover Surplus, Andover, Byron & Roxbury towns, Oxford, Maine, United States

Household Gender Age Birthplace
Head George W Abbott M 55 Maine
Wife Abbie Abbott F 58 Maine
Boarder Josephine B Tobin F 65 Maine

According to Maine, Vital Records, 1670-1907, she died 16 Jan 1903 in Andover. Father's Name: John Tobin
Mother's Name: Abigail Hodsdon