I had no knowledge of a secret chamber behind the wall.

To his knowledge, no one knew of the secret chamber save himself.

I went to investigate, and opened the door to her secret chamber.

God whispered in the secret chambers of the human heart.

Yet, perhaps, in the secret chambers of consciousness, she had her thoughts too.

He couldn't; the words had been like a finger tapping against a secret chamber of his heart.

And he even has a secret chamber in his basement!

And because that didn't seem to be enough, in some deep, secret chamber of her heart, she mourned for them.

In moments I would know if there were secret chambers underground.

You could not find the way into the secret chamber without me.