"Maine Vital Records, 1670-1921," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:Q24X-15G2 : 13 March 2018), Prescott Sheldon Bush, Birth 10 Aug 1922; citing Division of Vital Statistics, State Board of Health, Augusta; FHL microfilm 10,083.
"Florida Marriages, 1830-1993," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QKH4-QCDS : 7 December 2017), Prescott S Bush and Elizabeth Louise Kauffman, 30 Dec 1944; citing Marriage, Florida, United States, Liberty County Clerk of Courts, Florida; FHL microfilm 2,115,789.
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XMP3-KDY : accessed 4 January 2018), Prescott S Bush, Greenwich, Fairfield, Connecticut, United States; citing enumeration district (ED) ED 134, sheet 4A, line 21, family 29, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 257; FHL microfilm 2,339,992.
It may be possible to confirm family relationships with Prescott by comparing test results with other carriers of his ancestors' Y-chromosome or mitochondrial DNA.
Y-chromosome DNA test-takers in his direct paternal line on WikiTree: