You are missing a noun. one of John Quincy Adams’ WHAT?
It wasn’t JQA himself, as he went on to a successful career in the HOuse.
Sorry. I am on medication for the flu.
One of JQA’s sons jumped off the ship and drowned himself on the way back to Massachusetts
Maybe there were more John Quincy Adams than we know about... or maybe he is like Doctor Who, he can die and just regenerate into another John Quincy Adams?