The unknown never went Travis' way, and he couldn't have gone the other without running into the arms of Correy; so he must have made use of the hidden door.

So convinced was I of this, after last night's discovery eliminated Travis as a suspect, that I made it my first duty this morning to examine this door and the mysterious little passageway back of it.

When first notified of this door, we had been assured that it had not been opened in years, that the only key remaining to it was the one the Curator showed us hanging from the ring he drew from his own pocket; and acting upon these statements, which I would not allow myself to doubt for a moment, we decided to open the door in our own way, which we immediately did.

The result was the instant discovery that some one had passed through this door and down these stairs very much later than years ago.

We could see, without taking a step beyond the doorway, traces of a well-shod foot in the dust lying thickly on every tread.