I don't own any of Sylvias books, just get them from the library so don't recall titles.
In one she was challenged about her ability to see ghosts or
departed spirits. So she told the challenger to stand in a certain spot.
It was right in the path of an oncoming spirit.
When the spirit walked right though the challenger he felt it.
The challenger was Montel.
I believe this experience affected/influenced him a great deal.
Anyway just my opinion.
Marge