It turned out that platform 13 was up some secret stairs and over a footbridge.

Zemba alone, his package with him, was ascending the secret stairs.

Talking with the unsuspecting Apaches, he had learned of the secret stairs up from the cellar.

The Shadow had heard them coming up by the secret stairs.

Then lead us to the room which opens on the secret stair.

All those of us who know the secret stair must die.

There's a secret stair in the wall, and I know where my father keeps the key.

He took the secret underground stairs four at a time.

Without another word, Morkai led them to the secret stair, then faded back into flames and was gone.

How close are the secret stairs to the underground?