The son was named Malcolm Barrett.
He is listed in the 1920 U.S. Census of Franklin County, New York, as a grandson with his mother Isabelle in the household of his grandmother, Sarah Cameron:
https://www.familysearch.org/ark:/61903/1:1:MJL8-24T
He is listed in the 1930 U.S. Census of Orleans, Jefferson County, New York as the stepson of Rev. Erastus Pratt.
https://www.familysearch.org/ark:/61903/1:1:X7ZL-1G3
His draft registration card lists him as Carmi Malcon Barrett, born on June 30, 1917, in Malone, New York and then a resident in Sodus New York, where he was employed by the Holland Furnace Company.:
https://www.ancestry.com/discoveryui-content/view/303039573:2238
He served in the U.S. Army from December 11, 1942, to October 2, 1943:
https://www.ancestry.com/discoveryui-content/view/9366805:2441
He died on March 17, 1982, in Broward County, Florida:
https://search.ancestry.com/cgi-bin/sse.dll?dbid=7338&h=2315700&indiv=try&o_vc=Record:OtherRecord&rhSource=2441