He whispers the telling words, "I remember."
Denisov talked in whispers with the esaul and the Cossacks rode past Petya and Denisov.
Of the behavior of the eldest princess and Prince Vasili she spoke disapprovingly, but in whispers and as a great secret.
The next one that whispers must come out and stand in the middle of the floor.
No one can prove it's not, therefore, the chance remains that Bloody Mary is indeed real and her story is remembered every time a young child whispers her name into a mirror.