He did not want to run the risk that someone would discover the secret passageway in the fireplace.

If his group had used one of the secret passageways, why couldn't this person use others?

There was a secret passageway under the street, it had turned out.

In fact, he liked to joke about entering his work space by way of a "secret passageway."

"Because the entrance to the secret passageway is on the second floor," she told him simply.

What were they going to find in the secret passageway?

"If one of them is really a secret passageway, there must be some way to tell."

He may have discovered the secret passageways himself, through some accident.

However, he was never able to use the secret passageway.

"Through the secret passageway," she said with one of her winks.