Fact: Residence (1850) Meadville, Crawford, Pennsylvania, United States
Fact: Burial (1851) Portsmouth, Rockingham, New Hampshire, United States of America
Sources
Pearce W. Penhallow, "Memoir of the Penhallow Family," New England Historical and Genealogical Register 32: 32.
"United States Census, 1850," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M4H7-2V4 : 12 April 2016), Justin M Folsom in household of Nathan S Folsom, Meadville, Crawford, Pennsylvania, United States; citing family 280, NARA microfilm publication M432 (Washington, D.C.: National Archives and Records Administration, n.d.).
"Massachusetts Deaths and Burials, 1795-1910," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:FHKW-YZ9 : 11 March 2018), Justin N. Folsom, 20 Apr 1851; citing , reference 593718; FHL microfilm 593,718.
Find A Grave, database and images (https://www.findagrave.com : accessed 17 March 2019), memorial page for Justin Nathaniel Folsom (8 Aug 1833–20 Apr 1851), Find A Grave: Memorial #165888632, citing Proprietors Burying Ground, Portsmouth, Rockingham County, New Hampshire, USA ; Maintained by June S (contributor 48667328) .