Hi Icare9
Yes, I agree George F Elliott (the original one, AP13) was not a Liberty ship, but was launched in 1918.
She was sunk at Guadalcanal on 8 August 1942 according to my Googling.
The ex-Delbrasil that you refer to in the edited version of your post was the second US ship to bear the name USS George F Elliott (AP105).
I can't explain why Peter thought AP13 was a Liberty Ship. Maybe he was told so by a fellow passenger and always believed it. Another thing to check up on!
Best regards. TOW