The Assassin’s Accomplice

[BettyO]

I agree. Mary knew this young man's voice; his physique, his manner. She had entertained him in her parlor, he had eaten at her table. He had conversed with her. Mary had sought him out at the Herndon House.

I would have to say that she knew him - at least something in his mien would have struck her; i.e. to make her think, "I've seen this fellow before; he seems familiar." Of course, she would have denied any recognition if she knew what he had done or thought that he would possibly implicate her son in any way.