A member of the Armed Guard on the "SS Nathanael Greene" was Norman E Hyams. Search for Hyams here:
http://www.armed-guard.com/allnames.html
(Note that the ship name is given incorrectly as "Nathaniel Green". This is a common error when searching on the ship name.) Here is a short newspaper article about Hyams.
https://www.newspapers.com/clip/5458...dayton-herald/
I ran across something interesting and I am not sure what it might mean. On this link:
https://www.wrecksite.eu/peopleView.aspx?239253
is mentioned a casualty, David H Galley, Cook on the Nathanael Greene.
This link:
https://www.abmc.gov/decedent-search/galley%3Ddavid
shows a David H Galley, US Merchant Marine, died September 27, 1942 and was buried in Cambridge American Cemetery.
Was David H Galley picked up (or transferred to) one of the British Escorts and then he died later?
The uboat.net website has David H Galley in the crew of the Nathanael Greene on 25 February, 1943, when it was torpedoed in the Med, which is probably not correct.
https://www.uboat.net/allies/merchan.../ship2694.html