Sources

I can only see one Frank P. Crandon inthe US in that period.

Frank P Crandon in Evanston, Illinois (1834-4 July 1919), b. Massachusetts

Involved iwthi the university, and also seems to have been employed as a tax commissioner

find a grave

Frank Philip Crandon
Birth 28 Oct 1834 Portsmouth, Newport County, Rhode Island, USA
Death 19 Jul 1919 (aged 84) Evanston, Cook County, Illinois, USA
Burial: Rosehill Cemetery and Mausoleum, Chicago, Cook County, Illinois, USA
Memorial ID 105662781

Employment

Chicago and North Western Railroad Employee Records. Chicago & North Western Historical Society, Berwyn, Illinois.

Name: Frank P Crandon
Birth Date: abt 1834
Record Date: 26 Nov 1915
Record Place: Evanston, Illinois
Death Date: 4 Jul 1919
Occupation: Tax Commissioner

1880 United States

Name: Frank P. Crandon
Age: 45
Birthplace: Massachusetts
Home in 1880: Evanston, Cook, Illinois, USA
Dwelling Number: 14
Race: White
Gender: Male
Relation to Head of House: Self (Head)
Spouse's Name: Sarah E. Crandon
Father's Birthplace: Massachusetts
Mother's Birthplace: New York
Occupation: Fare Com. R.R.
Neighbors:
Household Members:
Name Age
Frank P. Crandon 45
Sarah E. Crandon 39
Anna L. Crandon 19
Lula M. Crandon 17
C. P. Washburn 37
Lomie L. Washburn 14