In the record of birth of his twin daughters in 1867, Frederick Morrill is listed as a Physician living in Roxbury, Massachusetts.

[1]Annie Morrill Smith, Morrill Kindred in America, Volume 2 (New York: Grafton Press, 1931), 54.

[2]1850 US Census , Lowell MA, p. 462.

[3]1860 US Census , Ward 4 Boston MA, p. 60.

[4]Massachusetts Vital Records 1841-1910 Database (Electronic Database: NewEnglandAncestors.org), 297: 134.