That would depend on finding an obituary for the parents or one of the children. I would suggest you post a message on the Plymouth, Massachusetts board herehttp://boards.rootsweb.com/localities.northam.usa.states.mas...
List their names and approximate birth dates, and ask if someone can help find death dates for Enoch and Annie. Arvid Fries was born in 1900, and died 23 April 1983 in Wareham, Plymouth County, Mass.
Also, Henry G. Fries died in Quincy Massachusetts on
14 March 1972 Here is a link to the Quincy library, where they will do a newspaper search for his firstname.lastname@example.org