It was hinted at that Grover Williams did survive, common with most killings in the camps there was no body and records kept by the guards were brief, the Seward book did not seem to give it much credence.
It would be nice too think he did survive, went to the usa and then returned to his wife under an assumed name. Cannot see why it would have been required for him to do so as he was a hero, but if he did the then it appears he was run over by a German tourist in the late 70s!
Will look at the Ryan book and give it a go.
One thing missing from the book, was any form of record of what they did. Maybe records were not kept and thier main role may have been in recruiting others, but at times they did seem to be a bit of a liability to others!